What major energy resource doo the world and uniteed states rely on?

Which of the following best describes the economy of africa?

In north america, most winter storms form when cold, dry air from interacts with warm, moist air from

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.