The Department of Energy and Climate Change says that although 75% of people support green energy, the proportion expressing strong support (24%) is lower than in the previous poll (33%).
Opposition to renewables was low at 4%, with only 1% of the public strongly opposed. Opposition is higher among over-65s (10%).
Data also shows that renewables accounted for 19.3% of the nation's electricity between 1 April 2014 and 31 March 2015.
