次の英文を読んで、設問に答えよ。
第6講
Some people are tempted to ask why do we worry so much about the
destruction of forests?
Most of the world's jungles are in developing Third World countries. These
countries need to exploit every available resource to help develop their economies,
5 increase their agricultural production and encourage the growth of local industries.
(2)
They naturally feel justified in using their forest resources to the full and in
clearing the forest for agriculture if the land is suitable. After all, this is exactly
what happened centuries ago in temperate regions like Europe. Nowadays very little
forest remains in the highly industrialized countries, but what there is is carefully
10 preserved and tended because at last people have become aware of what they have lost
(3)
by the uncontrolled removal of the trees.
The losses are difficult to evaluate. However, the loss of tropical forests would
have very far-reaching effects both on the countries concerned and on the whole world.
The loss to science of animal and plant species in the tropics would be far greater than
15 in temperate regions because of the far greator
