Coal is a fossil fuel that formed through the transformation of organic plant matter. It is primarily used as a heat source to generate electricity.
Sea levels dropped 300 feet.
A land bridge connected Siberia and Alaska
There were major asteroid impacts.
The rate of population increase stays constant.
cleave
Nuclear.
Good News: A Fusion Reactor will be operational in 2016; on the other hand it will not be commercially available until 2045. {Song: "Take Care Brother, Beware!"}.
they have a continental rise
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The feature that is the result of a glacier carving out rock as it moves is a roche moutonnees. It is a rock formation created by the passage of glacier ice.
Or a terminal moraine
A convergent plate boundary is a location where two tectonic plates are moving toward each other, often causing one plate to slide below the others.