What balances the effect of air pollution in soil?
wind rubber batteries watershed salinity Earthworms compost acid
A B C D E F G H
Compost balances the pH of soil.
air pollution is balanced by compost in soil
What balances the effect of air pollution in soil? (A) wind (B) rubber (C) batteries (D) watershed (E) salinity (F) Earthworms (G) compost (H) acid