What is the south american guarani aquifer system?
a 'no take' zone

a marine ecosystem

a supply of groundwater

the world's largest rain forest

places of higher salinity. there are parts of the ocean where hardly any rain falls but warm dry winds cause lots of evaporation. this evaporation removes water – when water vapour rises into the atmosphere, it leaves the salt behind, so the salinity of the seawater increases. this causes the seawater to become denser.