Four surveys since 2006 show a recent shift in US opinion on global warming, across the political spectrum. Photograph: Pew Research Center for the People & the Press

US survey shows public less sure about global warming

Fewer Americans now say there is ‘solid evidence’ of global warming than did a year ago, but modest support exists for scheme to limit carbon dioxide emissions – except among those who say they’ve heard a lot about it.

Published: Thursday, October 22 2009