Two-thirds of Americans now say there is solid evidence of global warming and an increasing proportion also say that the rise in the earth's temperature has mostly been caused by human activity.
About half of Americans say the price of gasoline has gone down over the past month. Those in West Coast states, however, are much more likely to see gasoline prices going up.
At a time of rising gas prices, more Americans continue to view the development of alternative energy sources as a higher priority than the increased production of oil, coal and natural gas, but the gap has narrowed considerably over the past year.
While 18% say President Obama or his administration are most to blame, about as many (14%) volunteer the oil companies or domestic oil producers. Roughly one-in-ten (11%) mostly blame Iran, the upheaval in the Middle East or the threat of war in the region.