Choose the best answer.

According to scientists, exhaust fumes are _________ our hometown.

Choose the best answer.

Water pollution has _______ many diseases for plants, animals and especially people.

Choose the best answer.

Water pollution can put negative _________ on our health.

Choose the best answer.

A: How can light pollution________ animals?

B: It can make animals change their behavior patterns.

Choose the best answer.

Any factories breaking the rules will be _______ heavily.

Choose the best answer.

In the environment class, we ______ up with some good ideas to save water.

Choose the best answer.

Fish and many other animals are killed by ________ in their habitat.