: Decide whether the statements below are true or false according to the text. Put a tick ( v ) in the right column Statements True False 1. Air pollution, water pollution, and soil pollution are three main kinds of pollution. 2. Air plays the most important role in our survival. 3. Carbon monoxide, carbon dioxide, and methane are poisonous gases. 4. The ozone layer helps to protect people from harmful UV rays. 5. China, the USA, Russia, India, Mexico, and Japan are the world leaders in air pollution prevention. 6. The thinning of the ozone layer is caused by smoke in the air from mills, factories, and industry. 7. Sewage contains germs and viruses. 8. Noise pollution is caused by the discharge of commercial and industrial waste into lakes and rivers.