Sách bài tập Tiếng Anh 7 trang 82 Unit 10 Reading Kết nối tri thức Exercise 2

Our environment is in trouble. People and industries are polluting the air, rivers, lakes and seas. There are many things you can do to help the environment. Here are a few.

Cars: The burning of petroleum is one of the biggest sources of carbon monoxide (CO) that causes global warming. CO thins the ozone layer, which protects us from the sunrays. So try walking, bicycling or using public transportation.

Energy: The biggest use of home energy is for heating and cooling homes.

It costs a lot of money. So don't use air-conditioners too often, especially at night. Replace regular light bulbs with low energy light bulbs, which use less energy.

Water: Showers use a lot of water. Buying a special "low-flow" shower head or taking shorter showers can cut this use in half.