IX. Complete the conversation with the sentences from the box. Brenda: Look at this headline, Steven! "Childhood cancer due to polluted living environment" Steven: (1) It's not strange to me now. Brenda: Really? (2) I've read about that kind of news for many times. Steven: Humans have polluted the environment for a long time, so they suffer the consequence. Brenda: (3) There must be some solutions to this. Steven: Well, there have been lots of researches proving that polluted air and contaminated food chain are linked to several diseases including lung cancers, cancers of the digestive organs, and heart attacks. (4) Pollution can even lead to other dangerous things such as global warming and natural disasters. Brenda: Oh, I've read some articles about the relation between climate change and some natural disasters. It's real and considerable. (5) Moreover, the area will also be polluted someday if you don't protect it. Steven: We can choose to live in unpolluted areas, or we should help together to reduce the pollution. (6) Then we all will have healthy life. Brenda: Living in an unpolluted area? It seems ideal, but most of the unpolluted areas are located in remote regions. (7) A better solution is the second one - reducing pollution to protect the environment. Steven: Yes. I think everybody knows it. I believe dangerous things like cancers or disasters will decrease when the world becomes greener. Brenda: (8) I really hope so. X. Fill in each blank with a word from the box. Air pollution is the addition of gases, chemicals, and particles (1) pollutants into the atmosphere. Air pollution primarily comes from burning fossil fuels such as natural gas, petroleum, and coal. A study has listed air pollution as the cause of four percent of the (2) deaths in the United States.