Where is the problem of air pollution most severe? rural areas urban areas mountain areas coastal areas?

:calculate the sum of the interior angles of a 13-sided polygon.

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.

Look at the map above. which of the following statement is true