U.S. gasoline imports rise following temporary easing of fuel standards
研究了2005年和2008年飓风后美国环保署暂时放宽燃料标准对汽油进口的影响，发现更统一的环境标准有助于外国炼油商满足美国异常需求。
EPA fuel standards were temporarily waived following major Gulf Coast hurricanes in 2005 and 2008, including Katrina. The results suggest that more uniform environmental standards could help foreign refiners meet extraordinary U.S. gasoline demand.