The document discusses the greenhouse effect and its exposures in Bangladesh. It provides background on the greenhouse effect and how it leads to warming of the Earth's surface. It then discusses how human activities like burning fossil fuels are enhancing the greenhouse effect by adding more greenhouse gases to the atmosphere. This can lead to issues like faster ocean warming, sea level rise, and melting of polar ice caps. It also discusses impacts on Bangladesh like rises in sea levels and increased health problems. The document provides examples of organizations taking steps to reduce greenhouse gas emissions.

1. Green House Effect
& Exposures in
Bangladesh

3. The greenhouse effect is a process by which thermal
radiation from a planetary surface is absorbed by
atmospheric greenhouse gases, and is re-radiated in all
directions.
Since part of this re-radiation is back towards the surface,
energy is transferred to the surface and the lower
atmosphere.
As a result, the temperature there is higher than it would
be if direct heating by solar radiation were the only warming
mechanism.

5. The greenhouse effect is a warming near
the Earth's surface that results when the
Earth's atmosphere traps the sun's heat.
The atmosphere acts much like the glass
walls and roof of a greenhouse.

6. The greenhouse effect was
discovered by Joseph Fourier in
1824.
First reliably experimented on by
John Tyndall in 1858.
First reported quantitatively by
Svante Arrhenius in 1896.

8. Green House Gases
NH4
Much of it remains trapped
in the atmosphere by the
greenhouse gases, causing
our world to heat up
Burning of Fossil Fuel
Industrialization
NOX +Co2
CFC NOx + Co2
Burning of NO+Co2
Oil, Petrol
CFC Engine

9. • Human activities are enhancing the Greenhouse Effect,
because we are continually adding heat-trapping greenhouse
gases to the atmosphere by factory emissions, vehicle
emissions, etc. Such gases include carbon dioxide, carbon
monoxide, chlorofluorocarbons, methane and ozone. The
table on the next slide shows some examples of natural and
man-made sources of some ‘Greenhouse Gases’.

11. Greenhouse Gas Natural sources Man-made sources
Carbon Dioxide Organic decay, Forest fires, Burning fossil fuels – car
Volcanoes and factory emissions,
electricity generation
Methane Wetlands, Organic decay, Natural gas & oil
Termites extraction, Biomass
Burning, Rice cultivation,
Cattle, Refuse landfills
Nitrous Oxide Forests, Grasslands, Biomass burning; Burning
Oceans, Soils, Soil of fossil fuels
cultivation; Fertilizers
Chlorofluorocarbons (CFCs) None Refrigerators; Aerosol
spray propellants; Cleaning
solvents

13. 1. Faster Ocean warming and catastrophic sea level rising
2. Polar ice caps melting
3. Climate change due to Green House effect.
4. Health Problem

14. • Many reputed organization now taking several steps for reducing greenhouse gas
effect. They are doing green management process for reducing greenhouse gas
effect. Among them some of those company’s name given below-
HSBC BANK
“HSBC BANK”
Obtain “the daily
BRITISH AND AMERICAN
TOBACCO star” green
management
award 2011.
UNILEVER
GRAMEENPHONE

16. 1. Use Green technology
2. reuse and recycle
3. Take steps at Home and Office
4. Learn Smarter car usage
5. Increase Social Awareness
6. Support ‘Emissions trading’
7. Support ‘Kyoto protocol’

18. • Water level rises of Bay of
Bengal
• Abrupt climate change
• Different skin diseases
• Causes natural calamities
• Impediment of agricultural
production etc.

20. Afterthought:
Prevention is better than cure.
We should work towards a greener future.
Save The World