So, someone at the UN now recognizes that we might want to postpone some global-warming amelioration, according to this report.

Jean Ziegler, who has been the United Nations' independent expert on the right to food [who knew such a position existed?], called for a five-year moratorium on biofuel production to halt what he called a growing "catastrophe" for the poor.

Scientific research is progressing very quickly, he said, "and in five years it will be possible to make biofuel and biodiesel from agricultural waste" rather than wheat, corn, sugar cane and other food crops.

The world price of wheat doubled in one year and the price of corn quadrupled, leaving poor countries, especially in Africa, unable to pay for the imported food needed to feed their people, he said. And poor people in those countries are unable to pay the soaring prices for the food that does come in, he added.

"So it's a crime against humanity" to devote agricultural land to biofuel production, Ziegler said a news conference. "What has to be stopped is ... the growing catastrophe of the massacre (by) hunger in the world," he said.

As an example, he said, it takes 510 pounds of corn to produce 13 gallons of ethanol. That much corn could feed a child in Zambia or Mexico for a year, he said.