1. Complete the sentences using the correct forms of the words in the box.

(Hoàn thành câu sử dụng dạng đúng của từ trong hộp.)

1. Solid __________ like coal and wood are still used for cooking and heating.

2. Burning __________ for heating and cooking can increase indoor air pollution.

3. When trees are cut down or burnt, they __________ the carbon they store into the atmosphere.

4. Many people are not aware that __________ is a stronger greenhouse gas than carbon dioxide.

5. One of our goals is to reduce global CO2 __________ by half in about ten years’ time.

6. Carbon dioxide is a __________ gas because it traps too much of the sun’s heat and stops it from escaping back into space.

7. It is important to understand the causes and effects of global __________ to protect our planet.

8. Soot from burning rubbish and organic __________ in open fires can cause the worst type of air pollution.

2. Choose the correct word or phrase to complete each sentence.

(Chọn từ hoặc cụm từ đúng để hoàn thành mỗi câu.)

1. Greenhouse gases/Renewable sources are heat-trapping pollutants that cause global warming.

2. Emissions of black carbon/greenhouse effect from indoor stoves can cause serious health problems.

3. When black carbon falls on snow it warms its surface and the snow melts/releases faster.

4. Carbon dioxide and other greenhouse gases are mainly produced by human activities/bodies.

5. Deforestation/The greenhouse effect means cutting down or burning the trees in an area.

6. The burning of crop waste/fossil fuels can kill useful soil bacteria and make the soil poorer.

7. Renewable/Non-renewable energy is important to our future as it is clean and sustainable.

8. Increase in temperatures can add more water to oceans, which can lead to a rise in sea levels/CO2 levels.

A. responsible

B. dirty

C. powerful

D. important