The Earth is in the last throes of the current ice age. Humans have left the planet to find a new home to settle in the universe and much of the world's fresh water is locked up in the huge ice caps that reach as far south as Paris and north to Buenos Aires. On the edges of the ice, animals have adapted to the bitter cold and vicious winters; in the tropics, the rainforest has all but disappeared, replaced by dry savannah. Yet change is in the air - a sudden increase in volcanic eruptions pours greenhouse gases into the atmosphere, the planet begins to warm up, and the melting ice creates massive, devastating floods.
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