6 ACTIVATE Work in groups. Look at the list of waste products in exercise 5. Decide on the three things which pollute the environment the most. Then answer the questions. ​

Air pollution is the introduction of harmful substances into the air, which has a negative impact on the environment, as well as on humans. As a result, the air is no longer clean.

In particular, hydrocarbons, various organic compounds, dust particles, gases are emitted into the air.