Popular concern about climate change has declined significantly, following this year's harsh winter and rows over statistics on global warming, a survey has found.

The numbers of those interested in where Britain's electricity comes from have also slipped back, according to a survey commissioned by the energy company EDF, demonstrating what appears to be growing consumer complacency in an era of electric-powered gadgetry.

At the same time resistance to building new nuclear power stations appears to be slackening. The results of the YouGov poll, based on a sample of 4,300 adults questioned during the week after the general election, show that interest in climate change fell from 80% of respondents in 2006, to 71% last year and now stands at only 62%. Only 80% say they are interested in where electrical power is made, down from 82% the previous year.

Other recent polls have recorded a similar drop in public alarm about the imminence of climate-triggered disaster. The number of climate change agnostics – those unsure whether human activity is warming the planet – has risen from 25% in 2007 to 33% now.

There may be many reasons for the change. Failure to reach agreement on fresh emissions targets at the Copenhagen climate summit, the furore over the leaking of global warming data from the University of East Anglia and the recent cold weather may all have contributed to confusion around the issue.

The French-owned firm EDF, which commissioned the latest poll, owns British Energy, which runs eight nuclear power stations in the UK. EDF plans to build a new generation of nuclear plants, with the first in operation by 2017.

The survey says the "favourability rating" of nuclear power stations rose from +4 to + 16 between 2007 and this year.

Among Lib Dems – the coalition party explicitly opposed to new nuclear building – as many as 58% of supporters believe "nuclear energy has disadvantages, but the country needs it to be part of the energy balance", according to the survey. Slightly fewer, 47%, are in favour of the construction of new nuclear power stations; 32% are opposed.

Vincent de Rivaz, chief executive of EDF Energy, said the poll "recognises the scale of the energy challenges facing the UK and the need for a low-carbon, eco-friendly economy as outlined by the coalition government.

"We are pleased to see strong public support across voters from all three major political parties in favour of new nuclear build. We also note that opposition to new nuclear build has continued to fall. This strong public support is further reflected by the clear backing for planning reform to facilitate investment in low carbon technologies, including nuclear.

"We need urgent action if we are to meet the UK's carbon emissions targets and address the looming energy gap. We believe nuclear power is the lowest cost low-carbon solution and can be built in the UK without subsidy. Therefore, it must be part of an affordable, clean and secure generation mix."

EDF, he said, "remains resolute in its commitment to a truly sustainable economy".