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Man-Made greenhouse effects

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Anoushka A

on 5 April 2015

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Transcript of Man-Made greenhouse effects

I was born...
covered with 71% of
water and 29% of land
More of natural resources
were in abundance.
There was ample sunlight, regular
rainfall, predictable seasons and
climates and lesser natural calamities.
I was well protected by
the ozone layer
But now things
have changed...
the amount of green house
gases in the atmosphere have increased due to man
made emissions which have diminished the ozone layer making me hotter
day by day.
Why is this happening
and what are these greenhouse gases?
When the sun's rays ( infrared radiations)pass through the atmosphere they are absorbed by the earth's surface. Energy is then radiated back to the atmosphere where some gases capture the radiated heat keeping the surface of the earth warm. These gases are called greenhouse gases which comprise of gases such as Carbon dioxide, Methane and Nitrous Oxide. This phenomenon is known as the

Now the increase in greenhouse gases
has led to the increase in the heating of the earth which is caused due to human activities which emit greenhouse gases to the atmosphere. Some of these activities are the burning of fossil fuels.
These fossil fuels contain carbon and when burnt are released into the atmosphere where carbon combines with oxygen to form carbon dioxide. Another important source of greenhouse gas emissions is deforestation which also emits carbon dioxide into the atmosphere.
Other than deforestation other agricultural activities such as livestock digestion, manure use, paddy rice farming, land use and wetland changes, pipeline losses, and vented subsurface landfill emissions lead to higher methane concentrations in the atmosphere.The use of Chlorofluorocarbons (CFCs) has increased in refrigeration systems, and halons in fire suppression systems and manufacturing processes. Chlorofluorocarbons are also one of the greenhouse gases.
The Effects!!!
Due to the increase in the volume of man made greenhouse gases there is a change in the balance of gases in the atmosphere. There are major uncertainties about the effect - one way or the other - of cloud cover and the circulation of ocean water on global warming. While there is not agreement on the amount and location of climate change, it is estimated the average global surface temperature could increase one to five degrees Celsius, and that there could be substantial change in precipitation patterns. It is believed northern latitudes (including Canada) would be affected more than equatorial regions; however, the effects of higher temperatures, accompanied by rising sea levels and changes in precipitation would be global. Food production could be affected by both coastal flooding and more frequent and severe droughts. Fresh water supplies, forests and land use could also be affected.
The Greenhouse
I'll be happy
Full transcript