5. POINT OUT THE FUNCTIONS OF ATMOSPHERE
It is a protective sunscreen that
filters out most of the harmful UV
rays
It is a store house of all natural gases
It is a pipeline that moves dust, and
contaminants around the globe
Keeping our planet at just right
9. DEFINITION
• Greenhouse gases in the atmosphere like
water vapour, carbon dioxide, nitrous
oxide, methane and CFC trap the heat
that is reflected from the earth.
• When more of these gases are sent to the
atmosphere by human activities, the
atmosphere tends to trap more heat and
the earth is heated up.
11. GLOBAL WARMING
CAUSES
GH GASES GH EFFECTS
water vapour,
carbon dioxide,
methane,
nitrous oxide, and
Chloroflurocarban
(CFCs).
The greenhouse
effect is a natural
process that
warms the Earth’s
surface.
13. CARBON DIOXIDE
Most important green house gas
Major contributor to global warming
Plants and animals release carbon dioxide when
they breathe
Carbon dioxide has increased due to
Burning of fossil fuels such as coal, oil and natural
gases
Global deforestation
14. HOW GLOBAL WARMING WORKS
Carbon Dioxide (CO2)
Fossil fuels (coal, oil, natural gas)
OZONE (O3)
24. EFFECTS OF GLOBAL WARMING
Winters become shorter and warmer
Summers become longer and hotter
Farmers affected due to decline in water supply
Polar ice caps and glaciers melt causing sea
level rise
Animals and plants may have trouble adjusting
to major changes in climate