1. Green House effect is an phenomenon in which earth's atmosphere traps the heat from the sun & prevents it from
escaping.
The phenomenon is so named because earth's atmosphere acts like a greenhouse made of glass in which sunlight enters
through transparent glass,
but the heat released by plants in the form of infrared radiations is not allowed to escape.
As a result of this , the temp. increasses inside the greenhouse.
In a similar manner, sunlight enters earth's atmosphere and heats the surface of the earth.
But certain gases present in the atmosphere trap the heat emitted by earth's surface & do not allow it to escape.
This causes an increase in temp. of earth's atmosphere. This is known as Global Warming.
The gases causing green house effect are called greenhouse gases. Carbon Dioxide, methane, ozone, and CFCs are the
green house gases present in the atmosphere which are responsible for global warming.
The greenhouse effect is the natural way the greenhouse gases in the atmosphere hold in the sun's heat and
keep the earth warm. The earth's carbon and water cycles have been keeping this balanced for millions of years.
The enhanced greenhouse effect (or accelerated greenhouse effect) is the warming effect caused by all
the extra carbon dioxide put into the atmosphere in the past 200 years, from manburning fossil fuels (coal, oil and
natural gas).
This enhanced Greenhouse effect is causing Global Warming.