помогите плиииз

1)The Earth's climate is getting warmer because of all the trees that are cut ... each year.
a - down
b - up
c - on

2) I ... energy by wearing more clothes in the house when it's cold.
a-waste
b-save
c-consume

3) We keep ... hurting our planet by wasting energy.
a - down
b - up
c - on

4) We need to bring ... our energy bills!
a - in
b - over
c - d