On 29 April 2008, US President George W. Bush declared during a press conference that "85 percent of the world's food prices are caused by weather, increased demand and energy prices", and recognized that "15 percent has been caused by ethanol".
2008年4月29日、米国のジョージ・W・ブッシュ大統領は記者会見で「世界の食料危機の85%は気候変動と、需要増加、エネルギー価格のせいだ」と述べ、「残りの15%はエタノールのせいだ」と認めた。