US concern over global warming grows

Record percentages of Americans are concerned about global warming, believe it is occurring, consider it a serious threat and say it is caused by human activity.

All of these perceptions are up significantly from 2015. Americans’ level of worry about global warming has seesawed over the past two decades.

Several plausible reasons include the May 2006 release of “An Inconvenient Truth,” highlighting Al Gore’s aim to educate Americans about global warming, as well as controversy from 2009 to 2011 surrounding global warming research, which may reflect Americans’ attention being diverted to the economy during the recession and post-recession years.

Anxiety about President Donald Trump’s environmental stance could be a factor in Americans’ concern.

Sixty-two percent of Americans now believe the effects of global warming have already begun to happen.

That eclipses the previous high of 61% recorded in 2008 and is up from 49% in 2011.