Global warming

What is global warming?
There has been a rise in temperature of the earth's atmosphere.
Scientists called this global warming,
because the whole earth ( globe ) is getting warmer.
Why is it so important to human being?
I don't think global warming is important to human being.
In fact, global warming is bad for human being.
I think you are asking why is greenhouse effect so important to human being?
It is because the greenhouse gas can trap the heat from the Sun and
keep the earth warm.
Human cannot live without greenhouse effect
because the earth will become very hot.
Which gases are greenhouse gases?
They include carbon dioxide(CO2), Chlorofluorocarbons(CFCs),
methane(CH4),Oxone(O3),Nitrous oxide(N2O).

1) Global warming is that the carbon dioxide is trapped in the atmosphere...and
leading to the rising in air temperature.

2) Originally, global warming is good for human being....since it makes the Earth warmer and human needs not to suffer from extremely cold weather. However, since the temperature continously rises and weather becomes hotter and hotter,global warming leads to many serious effect to human being. For example, the
ice cap and snow melts lead to rise in sea level, the ice in North Pole will melt
and threaten the life of wildlife habitats such as Polar bear.

3) Greenhouse effect means the temperature increases rapidly those years.

4) Greenhouse gases include Carbon dioxide, methane, CFCs, nitrious oxide.
They are the gases which lead to uprising of temperature.

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