Hint - Melting Ice Caps

Remote sensing satellites are commonly used to take measurements about the Earth. The satellite can use a polar orbit that allows it to monitor both poles. It is difficult to take these types of measurements from Earth because the polar regions are too dangerous and remote for people to travel to. A remote sensing satellite can use its instruments to keep track of the rate at which the ice is melting, the changing shape of the land, and the temperature of the oceans.

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