What disadvantages do West and Central Africa’s countries face when they depend on just a few exports?

Me plzzz what is the ratio of water than falls on land as compared to the amount that falls onto the oceans? what role do clouds play in regulating earth’s energy balance? me plzzz

How did geographic isolation affect the islands in the australasia ecozobne?

St. louis, missouri, and san francisco, california, both lie around 33° north latitude. st. louis is inland, while san francisco is on the coast of the pacific ocean. which statement about these north american cities would be true? san francisco will be warmer than st. louis in the winter. san francisco and st. louis will be about the same temperature year round. san francisco will be warmer than st. louis in the summer. san francisco will be warmer than st. louis year round.