Question

Read the article again. Match the highlighted words with their meanings.

1. emissions	a. a gas without smell or colour, often used as a fuel
2. balance	b. a chemical substance found in all living things
3. carbon	c. a situation in which different things are equal
4. methane	d. gases or other substances that are sent into the atmosphere

Answer 1

1. D

2. C

3. B

4.  A

Answer 2

1 - d

2 - c

3 - b

4 - a