Mr Clegg will today announce the government's new investment plan in energy efficiency.
Last year many environmentalists were dismayed by Chancellor George Osborne's comment the Tory conference that, while the Government would invest in green energy, "we're not going to save the planet by putting our country out of business".
And the Treasury is understood to have demanded cuts of 25% in subsidies for onshore windpower in a tussle between Mr Osborne and Liberal Democrat Energy Secretary Ed Davey, which ended last month with a 10% cut but question marks hanging over the 2030 target for decarbonising the economy.
More top news
All eyes are on the stars as they arrive on the red carpet for the 89th Oscars. But who won in the fashion stakes?
Tributes have been paid to the Labour MP for Manchester Gorton and Father of The House of Commons who has died aged 86.
A very unsettled start to the new week with heavy, thundery, occasionally wintry showers spreading in from the west throughout the day.