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High oil prices have a clear economic effect. But for highly indebted, impoverished countries, climate change, fueled significantly by CO2 emissions from cars and other gas-guzzling vehicles in the North, will have serious ecological, social and economic impacts as well.

Says Saul, “A key way to transition away from dependence on oil is through debt cancellation. Countries need fiscal space in order to invest in the post-fossil fuel economy — but the debt trap keeps countries from meeting a wide variety of social needs.”

Corn is caught in a tug-of-war between ethanol plants and food, one of the first signs of a coming agricultural transformation and a global economic shift. Ever since our ancestors in the Fertile Crescent first figured out how to grow grains, crops have been used mainly to feed people and livestock. But now that's changing in response to the high price of oil, the cost in lives and dollars of ensuring a supply of petroleum imports, and limits on climate-warming emissions of fossil fuels.