Question

Giải thích
There are many ways will be used to solve the problem of _____________. (pollute)

4. Solar power can be used to ______________or cool our houses. (hot)

5. __________________, fossil fuels are harmful to the environment. (fortunate)

Answer 1

1.There are many ways will be used to solve the problem of pollution.

2.Solar power can be used to heat or cool our houses.

3.Unfortunately, fossil fuels are harmful to the environment.