Unit 7: Pollution

Match each word below with its correct definition.

• air pollution ||  the contamination of air by smoke and harmful gases
• light pollution || the brightening of the night sky preventing us from seeing stars by improper lighting of communities
• water pollution || the contamination of any body of water, such as lakes, groundwater, oceans,...

Choose the best option to complete the sentence.

Scientists have come up _____________ new ways of saving energy.

1. with
2. at
3. by
4. into

Choose the best option to complete the sentence.

A number of cleaning products contain ______________ chemicals. ​

1. harmful
2. harmless
3. harm
4. harmony

Choose the best option to complete the sentence.

Americans throw ______________ twenty-eight and a half million tons of plastic in landfills every year.

1. away
2. up
3. to
4. at

Match each word/phrase below with its correct Vietnamese translation.

• water pollution || ô nhiễm nước
• land/soil pollution || ô nhiễm đất
• light pollution || ô nhiễm ánh sáng
• air pollution || ô nhiễm không khí