For a person standing on earth’s surface, the force of gravity is greater at the poles than near the equator because gravity increases as- A. temperature decreases.
B. mass of an object
descreases.
C. Magnetic poles become nearer.
D. Distance between objects descreases.

burning of wood and coal

explanation:

the panel also concluded there's a better than 95 percent probability that human-produced greenhouse gases such as carbon dioxide, methane and nitrous oxide have caused much of the observed increase in earth's temperatures over the past 50 years.

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