7. Deforestation
Deforestation
is the destruction of forests on a large scale . Forests play a vital role in
the world . But humans are destroying forests . Trees are being cut down for
wood . They are used in paper-making . Forests are being destroyed for road
building . They are cut down to provide land for large herds of cattle to graze
on . In Africa rainforest has been burnt down to provide farmland for the poor .
But this deforestation affects us all . Forests absorb heat . Rainforests
absorb carbon dioxide . Without forests the atmosphere may warm up . The polar
ice caps will melt . The sea level will be increased . As a result lower part
of the world will go under water . This is the greenhouse effect . It is one of
the serious effects of deforestation . Keeping these dangers in mind , we
should preserve forests.
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