MACRO
AIR
POLLUTANTS
AICD RAIN
OZONE DEPLETION
GREEN HOUSE
EFFECT
ACID RAIN
WHAT IS ACID RAIN?
 Acid gases are
produced when fossil
fuels like coal and oil
are burned in power
stations, factories
a...
GASES CAUSING ACID
RAIN
 Sulphur dioxide (SO2)
 Nitrogen oxides
 Volatile organic
compound
REACTION
 When CO2 reacts with water, carbonic acid is
formed.
CO2 (g)+H2O(l) H2CO3(aq)
 When SO2 reacts with water, su...
SOLUTIONS
 Sulphur dioxide can be removed from power stations
chimneys but this process is expensive.
 Use renewable ene...
OZONE DEPLETION
OZONE LAYER
Belt of ozone gas 15 to 50 kilometers above the earth's
surface where ozone is present in concentrations of a
...
OZONE DEPLETION
The fragile shield of ozone is been damaged by chemicals
released on earth. The main chemicals that are de...
GREEN HOUSE EFFECT
The “Greenhouse Effect”
 The Earth’s surface thus receives energy
from two sources: the sun & the
atmosphere
– As a resul...
Electromagnetic Spectrum
incoming outgoing
1. Shorter, high
Energy wavelengths
Hit the earths
Surface
2. Incoming energy
Is converted to heat
3. Longer, infrared
Wavelengths hit
Greenhouse gas
Molecules in the
atmosphere
4. Greenhouse gas
Molecules in the
Atmosphe...
78% nitrogen
20.6% oxygen
< 1% argon
0.4% water
vapor
0.036% carbon
dioxide
traces gases:
Ne, He, Kr, H, O3
Methane, Nitro...
SOLUTIONS
 Eliminate/Minimize Fugitive Emissions.
 Improve Combustion Efficiency.
 Improve Process Efficiency.
macro air pollutant
macro air pollutant
Upcoming SlideShare
Loading in …5
×

macro air pollutant

776 views

Published on

this is macro air pollutant, like acid rain and ozone depletion......etc

Published in: Education, Technology, Business
  • Be the first to comment

macro air pollutant

  1. 1. MACRO AIR POLLUTANTS
  2. 2. AICD RAIN OZONE DEPLETION GREEN HOUSE EFFECT
  3. 3. ACID RAIN
  4. 4. WHAT IS ACID RAIN?  Acid gases are produced when fossil fuels like coal and oil are burned in power stations, factories and in our own homes. Most of these acid gases are blown into the sky, and when they mix with the clouds it can cause rain - or snow, sleet, fog, mist or hail - to become more acidic.
  5. 5. GASES CAUSING ACID RAIN  Sulphur dioxide (SO2)  Nitrogen oxides  Volatile organic compound
  6. 6. REACTION  When CO2 reacts with water, carbonic acid is formed. CO2 (g)+H2O(l) H2CO3(aq)  When SO2 reacts with water, sulfurous acid is formed. SO2 (g)+H2O(l) H2SO3(aq)  When NO2 reacts with water, nitric acid is formed. 2NO2(g)+H2O(l) HNO2(aq)+HNO3(aq)
  7. 7. SOLUTIONS  Sulphur dioxide can be removed from power stations chimneys but this process is expensive.  Use renewable energy like wind power, solar panels, tidal power, and geothermal energy.  Fit catalytic converters to vehicle exhausts which remove the nitrogen oxides.  Limit the number of vehicles on the roads and increase public transport.
  8. 8. OZONE DEPLETION
  9. 9. OZONE LAYER Belt of ozone gas 15 to 50 kilometers above the earth's surface where ozone is present in concentrations of a few parts per million. This layer blocks (absorbs) ultraviolet part of the solar radiation (which causes skin cancer) from reaching the earth's surface.
  10. 10. OZONE DEPLETION The fragile shield of ozone is been damaged by chemicals released on earth. The main chemicals that are depleting stratospheric ozone are :  CHLOROFLUOROCARBONS  AEROSOLS  HALONS.
  11. 11. GREEN HOUSE EFFECT
  12. 12. The “Greenhouse Effect”  The Earth’s surface thus receives energy from two sources: the sun & the atmosphere – As a result the Earth’s surface is ~33 C warmer than it would be without an atmosphere Greenhouse gases are transparent to shortwave but absorb longwave radiation – Thus the atmosphere stores energy
  13. 13. Electromagnetic Spectrum incoming outgoing
  14. 14. 1. Shorter, high Energy wavelengths Hit the earths Surface 2. Incoming energy Is converted to heat
  15. 15. 3. Longer, infrared Wavelengths hit Greenhouse gas Molecules in the atmosphere 4. Greenhouse gas Molecules in the Atmosphere emit Infrared radiation Back towards earth
  16. 16. 78% nitrogen 20.6% oxygen < 1% argon 0.4% water vapor 0.036% carbon dioxide traces gases: Ne, He, Kr, H, O3 Methane, Nitrous Oxide
  17. 17. SOLUTIONS  Eliminate/Minimize Fugitive Emissions.  Improve Combustion Efficiency.  Improve Process Efficiency.

×