Question

C. Match the following:
Column 1
1. Nitrogen
2. Oxygen
3. Carbon dioxide
4. Sound waves
5. Air pollution
6. Clean fuel
Column II
a. Caused by forest fires
b. Need air to travel
c. Does not support burning
d. Compressed natural gas
e. Laughing gas
f. Used for burning
g. Raw material for photosynthesis​

Answer 1

Answer:

1 = e

2 = c

3 = g

4 = b

5 = a

6 = d

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