Grammar work

A Make the active sentences passive.

1. We need cooperation of specialists in different spheres of practical activities to solve this complex problem of nature conservation.

2. We have to give basic information on ecology to future ecologists, biologists, geologists, economists, engineers, and students of other specialties.

3. The article gives recommendations on the usage of some unusual energy resources to those who are interested in ecological problems.

4. We know that waste products of chemical enterprises are harmful for environment.

5. Scientists classify certain types of wastes that cause immediate danger to exposed individuals or environments as hazardous.

B Choose the appropriate modal verb.

1. Our country's pollution (can, should, might) be every country's problem.

2. We all (must, ought to, need to, are to) work together to safeguard our environment.

3. We (must not, can not, may not, need not) sacrifice our future well-being for short-term gains, nor pile up environmental debts, which will burden our children.

4. Where there are real threats to our planet we (may, ought to, have to, can) take great care: prevention (can, could, might) often be better and cheaper than cure.

5. To solve ecological problem only environmentalists (must, have to, need to) cooperate.

C Choose the correct preposition.

1. The programme …. rational utilization and reproduction …. natural resources is …. great importance …. nature conservation.

2. The ideas and practices that fall ….. the heading of industrial ecology are still … their infancy.

3. In all probability, only a small fraction of U.S. manufacturing companies are aware … them or have actually put them ….. practice.

4. Ocean mechanical energy is quite different …. ocean thermal energy.

5. Even though the sun affects all ocean activity, tides are driven primarily …. the gravitational pull …. the moon, and waves are driven primarily …… the winds.

Vocabulary work

C Match the words with their definitions.