Why are / 1/6 of the world's people at risk for running out of drinking water?

What events caused the united states to intervene in southwest asia?

What is the general rule about surface currents? cold water flows along the ocean floor towards the equator. the east coasts of continents have cold surface currents, and the west coasts of continents have warm surface currents. seasonal and constant offshore winds create significant upwelling along the west coasts of south and north america and africa. the west coasts of continents have cold surface currents, and the east coasts of continents have warm surface currents.

At which boundary does subduction stop occurring, resulting in a mountain range?