The sahara desert covers 3 1/2 million square miles. does that mean it is much smaller, roughly equal to, or much larger than the u. s.?

Alow-pressure belt means the air is cold and dry warm and rising cold and sinking warm and moist

The earth rotates on its axis and revolves around the sun every

The oil and gas found in the middle east are regulated by a. organization of petroleum exporting countries b. southwestern asian oil refineries c. north atlantic treaty organization