The sun does the work of evaporating the water from the salty ocean and carrying it over land.
Desalination is too expensive to do on a large-scale.
Ocean Zonation Bentic environment is bottom environment Pelagic environment is the water away from the bottom. Light Water absorbs light quickly, especially wavelengths other than blue. Below 10 m, everything rapidly becomes blue. Below 600 m, ocean darker than a moonlit night Average ocean depth is about 4,000 m, so most of the ocean is very dark. Temp Ocean changes temperature much more slowly than land, but it has some unique characteristics.