视听说

新视野
unit 7
According to your experience,what damages are being done to the environment?
1.Exhaust waste gas from the cars and factories are poisoning the air of our cities.
2.Many tees are cut down,which will cause weather problem.Even some rare animals are on the edge of extinction.
3.Some people litter public aeas with waste material.

Can you think of some measures to protect forests?
1.Plant some trees
2.Shut down some factories which pollute environment
3.The government should make efforts to improve people awareness about environmental pollution.

If a chemical plant has to dump a poisonous substance into the iver, but its closing-down means that many wokers will lose their jobs and the local economy will be affected, then what do you propose to do?
1.The chemical plant may purify the polluted water.
2.Using the advanced devices to avoid dumping a poisonous substance into the river.

Which types of energy should we use:wood,coal,petroleum,water power,nuclear energy or solar energy?Give you reasons.
we should use water power,nuclear energy and solar energy.Because these energies don't pollute the environment,and they are natural.