Because of rain/ the water cycle
Lake is a large body of water and sea is salt water covering most of earths crust.
Pls make me the brainliest, Peace
Answer:
The presence in the air of one or more contaminants in such a concentration and of such duration as to cause a nuisance or to be injurious to human life, animal life or vegetation.
When surface current and deep currents combine to form convection currents that transfer energy