The document discusses automobile emission control systems. It describes the types of emissions from vehicles like carbon dioxide, nitrogen oxides, and carbon monoxide. It explains the purpose of emission control systems like catalytic converters, air injection systems, and evaporative emission controls. It also discusses laws and standards that regulate vehicle emissions to reduce air pollution.
This is a presentation on the emission norms present in India i.e Bharat Stage and in Europe i.e Euro. it also has a comparison between the two as well as a timeline of the two.
This is a presentation on the emission norms present in India i.e Bharat Stage and in Europe i.e Euro. it also has a comparison between the two as well as a timeline of the two.
As we know air pollution is big challenge for the world
The air pollution due to automobile is 70% of total pollution of air pollution.
We have several way for controlling automobile pollution.
The most effective way is by using catalytic converter in automobile
In short catalytic converter are used to convert the harmful gas to harmless gas
What is Bharat Stage 6? Bharat Stage 6 Emission Standards | BS6 ppt file | Pr...Sandeep Kumar
This is the detailed presentation file about Bharat Stage 6 Emission Standards. It include all the information about What is Bharat Stage 6, BS6, BS VI & why it implemented & what was the process behind it. This ppt include all the details about the Standards & limits about Emission of Chemicals & exhaust gases from smoke of vehicles. Hope this will be helpful for you.
Made by- Er. SANDEEP KUMAR
presentation on bharat stage 6 and its emission norms, advantages, what is bharat stage 6, bharat satage 6 fuel, bharat stage 6 conclusion, bs 6, bs vi, why india leapfrog from bs iv to bs vi
Selective Catalytic Reduction (SCR) is an advanced active emissions control technology system that injects a liquid-reductant agent through a special catalyst into the exhaust stream of a diesel engine. The reductant source is usually automotive-grade urea, otherwise known as Diesel Exhaust Fluid (DEF). The DEF sets off a chemical reaction that converts nitrogen oxides into nitrogen, water and tiny amounts of carbon dioxide (CO2), natural components of the air we breathe, which is then expelled through the vehicle tailpipe.
SCR technology is designed to permit nitrogen oxide (NOx) reduction reactions to take place in an oxidizing atmosphere. It is called "selective" because it reduces levels of NOx using ammonia as a reductant within a catalyst system. The chemical reaction is known as "reduction" where the DEF is the reducing agent that reacts with NOx to convert the pollutants into nitrogen, water and tiny amounts of CO2. The DEF can be rapidly broken down to produce the oxidizing ammonia in the exhaust stream. SCR technology alone can achieve NOx reductions up to 90 percent
Pollutant,their formation and control in Internal Combustion EnginesHassan Raza
This presentation was prepared by Mechanical Engineering students during their Internal Combustion Course. Students belong to a very prestigious Engineering institute of Pakistan "University of Engineering and Technology Lahore"
In response to an increasing push for clean diesel emissions, medium and heavy duty diesel-powered trucks have adopted complex exhaust or emission aftertreatment systems.
These systems treat post-combustion gases after they leave the engine, reducing environmental impact without sacrificing power or performance.
As we know air pollution is big challenge for the world
The air pollution due to automobile is 70% of total pollution of air pollution.
We have several way for controlling automobile pollution.
The most effective way is by using catalytic converter in automobile
In short catalytic converter are used to convert the harmful gas to harmless gas
What is Bharat Stage 6? Bharat Stage 6 Emission Standards | BS6 ppt file | Pr...Sandeep Kumar
This is the detailed presentation file about Bharat Stage 6 Emission Standards. It include all the information about What is Bharat Stage 6, BS6, BS VI & why it implemented & what was the process behind it. This ppt include all the details about the Standards & limits about Emission of Chemicals & exhaust gases from smoke of vehicles. Hope this will be helpful for you.
Made by- Er. SANDEEP KUMAR
presentation on bharat stage 6 and its emission norms, advantages, what is bharat stage 6, bharat satage 6 fuel, bharat stage 6 conclusion, bs 6, bs vi, why india leapfrog from bs iv to bs vi
Selective Catalytic Reduction (SCR) is an advanced active emissions control technology system that injects a liquid-reductant agent through a special catalyst into the exhaust stream of a diesel engine. The reductant source is usually automotive-grade urea, otherwise known as Diesel Exhaust Fluid (DEF). The DEF sets off a chemical reaction that converts nitrogen oxides into nitrogen, water and tiny amounts of carbon dioxide (CO2), natural components of the air we breathe, which is then expelled through the vehicle tailpipe.
SCR technology is designed to permit nitrogen oxide (NOx) reduction reactions to take place in an oxidizing atmosphere. It is called "selective" because it reduces levels of NOx using ammonia as a reductant within a catalyst system. The chemical reaction is known as "reduction" where the DEF is the reducing agent that reacts with NOx to convert the pollutants into nitrogen, water and tiny amounts of CO2. The DEF can be rapidly broken down to produce the oxidizing ammonia in the exhaust stream. SCR technology alone can achieve NOx reductions up to 90 percent
Pollutant,their formation and control in Internal Combustion EnginesHassan Raza
This presentation was prepared by Mechanical Engineering students during their Internal Combustion Course. Students belong to a very prestigious Engineering institute of Pakistan "University of Engineering and Technology Lahore"
In response to an increasing push for clean diesel emissions, medium and heavy duty diesel-powered trucks have adopted complex exhaust or emission aftertreatment systems.
These systems treat post-combustion gases after they leave the engine, reducing environmental impact without sacrificing power or performance.
The Role of Airports in Addressing Carbon TargetsWSP
Andrew Marsh-Patrick co-presented with Manchester Airport’s Environment Advisor, Adam Freedman at the Passenger Terminal Expo and Conference 2017. They explained the role of airports in achieving COP21 climate change targets.
Andrew Marsh-Patrick is part of WSP's team acting as administrator for the ACI’s Airport Carbon Accreditation program, which has certified more than 170 airports around the world.
Exhaust system of an automobile is an essential system, incorporated to remove exhaust gases
from the engine in a manner to reduces the exhaust emissions in the environment.
Future of Heavy Duty Vehicles CO2 Emissions Legislation and Fuel Consumption ...JMDSAE
By Dimitrios Savvidis
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Latest developments on CO2 legislation in Europe
Overview of GHG emissions in the transport sector in Europe
New simulation tool – VECTO
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Vehicle Emission Testing Stations in PakistanMuhammad Aqil
Presentation on the importance of vehicle emission testing including procedure of testing and different vehicle emission testing stations currently available in Pakistan. It also includes the policy and situation of Pakistan regarding vehicle emission testing.
A major part of the air pollution caused is due to the vehicular emission which is increasing at an alarming rate. The different types of vehicles like car, bus, truck etc. contribute a way as well as play a dominant duty in increasing air pollution. These vehicles find its running source mainly form the extracts of fossil fuels like petrol, diesel. The fuels undergo combustion to generate energy so as to support the vehicle for duty. The incomplete combustion of the fuels in the engine paves a way for production of products like the carbon monoxide, hydrocarbons and particulate matters. A high emission level is therefore a proved result. For the purpose of forcing the fuel to have efficient combustion and for reduction of the emission levels for reducing air pollution a wide range of processes are applicable. These include improvising engine design, fuel pre-treatment etc. Among these wide ranges of options available catalytic converter is found to be a better way for establishing an efficient combustion in the controller engine of the vehicle. Usage of noble group metal is an effective way for effective combustion like the platinum group metal serves way good for reducing the exhausts. With the help of secondary measures efficiency of the engine is improved as well. The techniques are still under development as because there are some limitations of the catalytic converters which are needed to be dealt with but the application of this technique has better achievement points as well.
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Why Ergonomics emerged?
Why ergonomics is important?
Types of Ergonomics
Objectives of Ergonomics
Effects of Ergonomics
Ergonomics Risk Factors
Preventing and Minimizing injuries
Anthropometry ?
Ergonomics principles
Ergonomics solutions
Advantages of Ergonomics
Conclusion
Ergonomics is a discipline that involves arranging the environment to fit the person in it. In other words, Ergonomics is the science and the art of fitting the job and the workplace to workers’ needs.
A nuclear weapon is an explosive device that derives its destructive force from nuclear reactions, either fission (fission bomb) or from a combination of fission and fusion reactions (thermonuclear bomb). Both bomb types release large quantities of energy from relatively small amounts of matter.
Today, nine states have nuclear weapons and many more can easily acquire those, although only five states are officially recognized as possessing nuclear weapons by the 1968 nuclear Non Proliferation Treaty (NPT). Those are
• The United States (1945)
• Russia (1949)
• The United Kingdom (1952)
• France (1960) and
• China (1964)
Four states never joined the NPT but are known to possess nuclear weapons:
• Israel
• India (1974)
• Pakistan (1998) and
• North Korea (2006)
Dyes are colored organic compounds that are used to impart color to various substrates, including paper, leather, fur, hair, drugs, cosmetics, waxes, greases, plastics and textile materials.
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Catalytic Reforming Process is one of the most important processes in the petroleum and petrochemical industries which produce high octane number gasoline.
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Soap is integral to our society today. For generation its use has increased and its manufacture has become an industry essential to the comfort and health of civilized human beings. Therefore we can say that Soaps and detergents occupy a vital place in modern chemical science.
The C++ programming language has a history going back to 1979, when Bjarne Stroustrup was doing work for his Ph.D. thesis. One of the languages Stroustrup had the opportunity to work with was a language called Simula, which as the name implies is a language primarily designed for simulations.
AIChE is the global home of chemical engineers. No matter where you live and work, you can rely on AIChE for the technical information, education, training, career resources and other advantages you need to achieve your goals for the life of your career.
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A brief about organic farming/ Natural farming/ Zero budget natural farming/ Subash Palekar Natural farming which keeps us and environment safe and healthy. Next gen Agricultural practices of chemical free farming.
Micro RNA genes and their likely influence in rice (Oryza sativa L.) dynamic ...Open Access Research Paper
Micro RNAs (miRNAs) are small non-coding RNAs molecules having approximately 18-25 nucleotides, they are present in both plants and animals genomes. MiRNAs have diverse spatial expression patterns and regulate various developmental metabolisms, stress responses and other physiological processes. The dynamic gene expression playing major roles in phenotypic differences in organisms are believed to be controlled by miRNAs. Mutations in regions of regulatory factors, such as miRNA genes or transcription factors (TF) necessitated by dynamic environmental factors or pathogen infections, have tremendous effects on structure and expression of genes. The resultant novel gene products presents potential explanations for constant evolving desirable traits that have long been bred using conventional means, biotechnology or genetic engineering. Rice grain quality, yield, disease tolerance, climate-resilience and palatability properties are not exceptional to miRN Asmutations effects. There are new insights courtesy of high-throughput sequencing and improved proteomic techniques that organisms’ complexity and adaptations are highly contributed by miRNAs containing regulatory networks. This article aims to expound on how rice miRNAs could be driving evolution of traits and highlight the latest miRNA research progress. Moreover, the review accentuates miRNAs grey areas to be addressed and gives recommendations for further studies.
"Understanding the Carbon Cycle: Processes, Human Impacts, and Strategies for...MMariSelvam4
The carbon cycle is a critical component of Earth's environmental system, governing the movement and transformation of carbon through various reservoirs, including the atmosphere, oceans, soil, and living organisms. This complex cycle involves several key processes such as photosynthesis, respiration, decomposition, and carbon sequestration, each contributing to the regulation of carbon levels on the planet.
Human activities, particularly fossil fuel combustion and deforestation, have significantly altered the natural carbon cycle, leading to increased atmospheric carbon dioxide concentrations and driving climate change. Understanding the intricacies of the carbon cycle is essential for assessing the impacts of these changes and developing effective mitigation strategies.
By studying the carbon cycle, scientists can identify carbon sources and sinks, measure carbon fluxes, and predict future trends. This knowledge is crucial for crafting policies aimed at reducing carbon emissions, enhancing carbon storage, and promoting sustainable practices. The carbon cycle's interplay with climate systems, ecosystems, and human activities underscores its importance in maintaining a stable and healthy planet.
In-depth exploration of the carbon cycle reveals the delicate balance required to sustain life and the urgent need to address anthropogenic influences. Through research, education, and policy, we can work towards restoring equilibrium in the carbon cycle and ensuring a sustainable future for generations to come.
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Diabetes is a rapidly and serious health problem in Pakistan. This chronic condition is associated with serious long-term complications, including higher risk of heart disease and stroke. Aggressive treatment of hypertension and hyperlipideamia can result in a substantial reduction in cardiovascular events in patients with diabetes 1. Consequently pharmacist-led diabetes cardiovascular risk (DCVR) clinics have been established in both primary and secondary care sites in NHS Lothian during the past five years. An audit of the pharmaceutical care delivery at the clinics was conducted in order to evaluate practice and to standardize the pharmacists’ documentation of outcomes. Pharmaceutical care issues (PCI) and patient details were collected both prospectively and retrospectively from three DCVR clinics. The PCI`s were categorized according to a triangularised system consisting of multiple categories. These were ‘checks’, ‘changes’ (‘change in drug therapy process’ and ‘change in drug therapy’), ‘drug therapy problems’ and ‘quality assurance descriptors’ (‘timer perspective’ and ‘degree of change’). A verified medication assessment tool (MAT) for patients with chronic cardiovascular disease was applied to the patients from one of the clinics. The tool was used to quantify PCI`s and pharmacist actions that were centered on implementing or enforcing clinical guideline standards. A database was developed to be used as an assessment tool and to standardize the documentation of achievement of outcomes. Feedback on the audit of the pharmaceutical care delivery and the database was received from the DCVR clinic pharmacist at a focus group meeting.
Characterization and the Kinetics of drying at the drying oven and with micro...Open Access Research Paper
The objective of this work is to contribute to valorization de Nephelium lappaceum by the characterization of kinetics of drying of seeds of Nephelium lappaceum. The seeds were dehydrated until a constant mass respectively in a drying oven and a microwawe oven. The temperatures and the powers of drying are respectively: 50, 60 and 70°C and 140, 280 and 420 W. The results show that the curves of drying of seeds of Nephelium lappaceum do not present a phase of constant kinetics. The coefficients of diffusion vary between 2.09.10-8 to 2.98. 10-8m-2/s in the interval of 50°C at 70°C and between 4.83×10-07 at 9.04×10-07 m-8/s for the powers going of 140 W with 420 W the relation between Arrhenius and a value of energy of activation of 16.49 kJ. mol-1 expressed the effect of the temperature on effective diffusivity.
Artificial Reefs by Kuddle Life Foundation - May 2024punit537210
Situated in Pondicherry, India, Kuddle Life Foundation is a charitable, non-profit and non-governmental organization (NGO) dedicated to improving the living standards of coastal communities and simultaneously placing a strong emphasis on the protection of marine ecosystems.
One of the key areas we work in is Artificial Reefs. This presentation captures our journey so far and our learnings. We hope you get as excited about marine conservation and artificial reefs as we are.
Please visit our website: https://kuddlelife.org
Our Instagram channel:
@kuddlelifefoundation
Our Linkedin Page:
https://www.linkedin.com/company/kuddlelifefoundation/
and write to us if you have any questions:
info@kuddlelife.org
DRAFT NRW Recreation Strategy - People and Nature thriving together
Automobile emission control systems
1. “Start with the name of Allah
who is the Most Beneficial &
Most Merciful. ”
2. Automobile Emission
Control Systems
USPCASW MUET Jamshoro
Presented by:
IHSAN ALI WASSAN
MS(Environmental Engineering)
U.S - Pakistan Center for Advanced Studies in Water
Mehran University of Engineering and Technology, Jamshoro
3. Mobile sources of Air Pollution and their broad classification
Types of auto emissions
Air Pollution reasons
Emission control systems
Laws and regulatory standards
Policies and Programs for the Management of Air Quality in Pakistan
Conclusion
References
Outlines
4. Mobile sources of Air Pollution
Mobile source air pollution includes any air pollution emitted by
-motor vehicles,
-airplanes,
-locomotives, and
-other engines
Google (source)
5. Broad Classification
Road sources
Cars
Light Duty & Heavy Duty Trucks
Buses
Motorbikes
Non-road sources
Aircraft
Motorboats (Diesel & Gasoline)
Locomotives
Construction Equipment
Diesel exhaust – Wikipedia (source)Car emissions and global warming – union of concerned scientists (source, Google)
Google (source)
6. Types of Auto Emissions
Evaporative Emissions (From Carburetor, Crankcase blow-by)
Refueling Losses( from Fuel tank )
Exhaust Emissions
Carbon Dioxide (CO2)
Nitrogen Oxides (NOx)
Carbon Monoxide (CO)
Aldehydye and other emissions (H2S and SO2 gases, Ash dust, H2SO4)
Smoke and particulate (White , Black smoke)
Theoretical combustion
Incomplete combustion of fuel
by liquid droplets of lubricating oil and fuel oil
Incomplete combustion of fuel
7. Source: EEA Report - Exploring road transport emissions - a non technical guide
(2016)
Types of Auto Emissions
9. To prevent unnecessary damage to human health and
the environment, environmental regulatory agencies
such as the U.S. Environmental Protection Agency have
established policies to minimize air pollution from
mobile sources
Mobile sources of Air Pollution
11. Elements of a comprehensive vehicle
pollution control strategy
Traffic &
Demand
Management
Clean Fuels
Appropriate
Maintenance
Zero
Emission
Vehicles
Clean
Vehicle
Technology
12. Emission control systems
Modern vehicles are fitted with emission control systems,
designed to reduce emissions. These include:
Catalytic Converter
Air injection (AIR) system
Exhaust gas recirculation (EGR) system
Evaporative emissions control (EVAP) system
Positive crankcase ventilation (PCV) system
14. A catalytic converter removes the harmful gases that exit the tailpipe
A three-way converter contains honeycomb coated with platinum, rhodium
and palladium to form oxidization and reduction converters
Pt and Rh (reduction catalysts, pull of nitrogen and oxygen)
Pt and pd (oxidation catalysts, use oxygen, help to bind them with CO to get
CO2, also oxidize any unburned HC)
Catalytic Converter
The oxidization converter stores oxygen when the
air/fuel mixture is lean (when AFR is higher than the
stoichiometric ratios)
15. Catalytic Converter
The conversion process produces temperatures upto 1600°F
Rhodium is best Catalyst to control NOx keeping A/F ratio within 14.6:1 to 14.7:1
Catalyst honeycomb
Outlet
Oxidization converter
Reduction converterSteel shell
Inlet
16. Air Injection System
• Clean air into exhaust ports by
a vane type air pump to ignite
unburned fuel (hydrocarbons),
within the exhaust manifold
• Vacuum operated diverter valve is used to
stop air flow during deceleration, otherwise
backfiring may occur
• A check valve is placed in the line to stop
hot exhaust gases traveling back up the air
hose
Figure . https://www.pistonheads.com
17. • The EGR system reduces NOX emissions
• It feeds inert exhaust gases back into the intake manifold, where they dilute the
air/fuel mixture, without altering the air/fuel ratio. With less oxygen and fuel,
combustion temperatures (and therefore NOx levels) are lower.
• The system uses an EGR valve that can be either vacuum and/or electronically
controlled.
• Early EGR valves were operated by ported vacuum. They did not function until
engine was at operating temperature and above idle speed.
Exhaust Gas Recirculation (EGR) System
18. Exhaust Gas Recirculation (EGR) System
Throttle plate
TVV
Exhausted gas flow
Fresh Air flow
EGR valve
Air filter
Figure Principle of Exhaust Gas Re-circulation (EGR) (Source: YouTube)
Electro-pneumatic
pressure transformer
19. • Fuel produces vapors, if stored in a container, the fuel tank has a sealed cap
that may contain valves to relieve fuel pressure and allow air in
• The tank contains an air dome that allows for fuel expansion and a vent line
for vapor removal
• It connects to a charcoal canister that stores vapors when the engine is
switched off
• A purge valve is used to control vapor removal from the canister
• Vapors are drawn into the intake manifold via a purge line
• In modern engines, the ECU controls valve (Engine control unit) operation
for optimum engine efficiency
Evaporative emissions control (EVAP) system
20. Evaporative emissions control (EVAP) system
Fuel tank Charcoal canister
Purge line
Purge valve
Intake manifold
Throttle plate
Vacuum line
Roll over/vapor separator
Vent line
Air
Fuel vapor
Vacuum
Non-vented cap
21. • Combustion produces high pressure in a cylinder
• Some of the pressurized gas leaks past the piston rings into the crankcase,
even on a new engine and is known as 'blowby‘
• Older vehicles had a breather tube that vented these gases into the
atmosphere
• Modern vehicles are fitted with a PCV system
• Vacuum is used to suck blowby out of the crankcase and into the intake
manifold to be burned
• Fresh air replaces the gases in the crankcase
• System operation is regulated by a PCV valve
Positive Crankshaft Ventilation (PCV)
22. Air flow
Blowby
Fresh air mixes with blowby gases in the crankcase
Vapors pass
through the
PVC valve and
hose
Vapors pass
into the
intake
manifold
Fresh air enters
Positive Crankshaft Ventilation (PCV)
25. • The PCV valve is a spring-loaded device, with an engine specific orifice size
• The valve is sealed shut when an engine is stopped to prevent backfires
• At engine idle speed, maximum vacuum defeats spring pressure and the
plunger moves to the other end of the valve, allowing minimal vapor flow
• At normal engine speeds, lower vacuum levels allow the plunger to move to
a central position and maximum vapor flow occurs
PCV Valve
27. First federal air pollution legislation
Funded research for scope and sources of air pollution
Authorized the development of a national program to
address air pollution related environmental problems &
techniques to minimize air pollution
Laws and regulatory standards
Clear Air Act (1963)
Air Pollution Control Act (1955)
28. Motor Vehicle Air Pollution Control Act (1965)
The first federal legislation designed to control emissions from
automobiles
The act required a 72% reduction in hydrocarbon emissions, a 56%
reduction in carbon monoxide emissions, and a complete elimination
of crankcase hydrocarbon emissions for all light duty vehicles
produced after 1968, using a 1963 base year.
Laws and regulatory standards
29. Air Quality Act (1967)
Authorized enforcement procedures for air pollution problems
involving interstate transport of pollutants and expanded research
activities
Authorized the establishment of National Ambient Air Quality
Standards and requirements for control of motor vehicle emissions
Clean Air Act Extension (1970)
Laws and regulatory standards
30. Clean Air Act Amendments (1977)
Laws and regulatory standards
Authorized provisions related to the Prevention of Significant
Deterioration
Authorized programs for Acid Deposition Control, to control 189 toxic
pollutants, including those previously regulated by the National
Emissions Standards for Hazardous Air Pollutants
Clean Air Act Amendments (1999)
31. • Total emissions by the transport sector was estimated in 1998 by the National
Emissions Inventory of Pakistan in the “Male Declaration on Control and
Prevention of Air Pollution and it's likely Trans boundary Effects for South
Asia” at
• 324,473 tons of NOx (over 90% by diesel, 9.5 %by gasoline; 65% share of
total NOx emissions by all sectors)
• 35,362 tons of PM (93% diesel, 6.5% by gasoline; 6%share of total emissions)
• 120,871 tons of SO2 (99% by diesel; 16% share of total SO2 emissions)
Policies and Programs for the Management of Air
Quality in Pakistan
32. Policies and Programs for the Management of Air
Quality in Pakistan
www.environment.gov.pk
33. Policies and Programs for the Management of Air
Quality in Pakistan
However, motor vehicle examiners who operate within the transport departments
each province conduct arbitrary inspections and issue a certificate of fitness for pu
and commercial vehicles
EPAs and the provincial traffic police are implementing a provincial motor vehicle
ordinance that allows them to apprehend private and public transport vehicles em
visible smoke, vapour, grit, sparks, ashes, cinders or oily substances and fine them
500 for such violation (ADB, CAI ASIA and Pakistan Clean Air Network 2006)
35. References
• The selection of an appropriate engine
• A European Union-funded project, called “NICE” or New
integrated combustion system for future passenger car engines,
aiming to develop a new integrated combustion system
Conclusion
36. References
• Atmospheric ecosystem, chapter 5, Source: Adapted from Pakistan EPA, Pakistan Clean Air Program
(2006); Pakistan EPA/World Bank (2006).
• Source: EEA Report - Exploring road transport emissions - a non technical guide (2016)
• BEIS/ Defra Greenhouse Gas Conversion factors 2019 (BBC)
• http://www.environment.gov.pk/images/environmentalissues/EstablishmentMotorvehicleemissionsInsp
ectionsystem.pdf
• https://www.youtube.com/watch?v=JotiMO3R8bQ
• https://slideplayer.com/slide/6167168/