為什麼熱帶雨林的多樣性正大幅減少?

Reasons:
People cut trees for firewood and paper, causing over-cutting. This reduces the area of tropical forests. As a result, there is less space for animals and plants to live in. Since a lot of animals could not face the new environment, they died and become extincted.
Impacts:
1)Global warming:
If there are less forests, there will be less trees. Trees absorb carbon dioxide and release oxygen for humans to breathe in. Without trees, less carbon dioxide will be absorbed. Carbon dioxide will go to the atmosphere, causing global warming. The impacts of global warming includes:
a)loss of icebergs, causing the water level to rise
b)rise in temperature
c)decrease in precipitation, causing famine and drought
d)rise in speed of spreading disease

2)Desertification:
Trees help block sand and hold soil. Without trees, there will be less roots holding soil. The soil will become loosen and finally led to desertification. The impacts of desertification includes:
a)economic loss
b)drought and famine
c)social unrest