Presentation on global warming

Presented by: Mihir .G. Roat 10B.C.A 46

Introduction to global warming
Causes & Effects of global warming
Impact of global warming
Prevention & protection
Conclusion

Global warming is the observed and projected increases in the average temperature of Earth's atmosphere and oceans
The Earth's average temperature rose about 0.6° Celsius
Water vapour h20, carbon dioxide co2, ozone etc. are greenhouse gases.

When the levels of greenhouse gases in the atmosphere increased they trap the excess HEAT.
This result GLOAL WARMING. (increase in temperature of earth)

CAUSES:
Almost 100% of the observed temperature increase over the last 50 years has been due to the increase in the atmosphere of greenhouse gas
Since 1880, large scale burning of fossil fuels and the other human activity led to an increase.
To this level of greenhouse gases in atmosphere get increase
Earth has warmed by 0.8°C.
EFFECT:
The sea level is rising faster

When sunlight reaches Earth's surface some is absorbed and warms the earth and most of the rest is radiated back to the atmosphere at a longer wavelength than the sun light. Some of these longer wavelengths are absorbed by greenhouse gases in the atmosphere. The absorption of this longwave radiant energy warms the atmosphere
These greenhouse gases act like a mirror and reflect back to the Earth some of the heat energy which would otherwise be lost to space. The reflecting back of heat energy by the atmosphere is called the "greenhouse effect".

Threatening to flood coasts, wetland and many low-lying island.
Rainfall and Snowfall patterns have changed across the world.
Raised in temperature’s has extinction of animal and plant species.
Before rain forest covered 14% of the earth’s land but now they cover a mere 6%.

Plant trees
Recycle
Save electricity
To use recycle paper
Save forest

As day-by-day increase in temperature, atmosphere is changed.
So, we should save our natural resources.
One tree produce nearly 120kg of oxygen every year.
For this grow more trees.

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