Change the sentences according to directions.

It is pollution which is the contamination of air, water, and soil.

Being a danger to health, it affects every living being.

The environment is not protected, so human health suffers./The environment is not protected, and so human health suffers.

Clean air can improve the quality of life.

Pollution is a threat which cannot but be controlled immediately.

What a serious concern this is!

The government alone cannot stop environmental degradation.

Citizens must take steps so that they can reduce pollution in their locality.

Nothing but strict laws can prevent environmental pollution.

We must take action, and thus we can save our environment.