Ed Davey has today commissioned another report on fracking - this time to gauge the risks of increased methane emissions.
“Emissions of methane - which is a potent greenhouse gas - are already subject to control, but I am today commissioning a study of the possible impacts of shale gas development on greenhouse gas emissions and climate change," he said.
Paul Watters, head of roads policy at the AA, has told the Sunday Telegraph that "most accidents" on the road happen in the dark.
The Royal Society for the Prevention of Accidents has admitted concerns over safety following an investigation by the Sunday Telegraph which claims lighting on some motorways, trunk roads and city streets has been turned off or dimmed at night in order to save money and cut carbon emissions.
Lighting on thousands of miles of motorways, trunk roads and city streets has been turned off or dimmed at night in order to save money and cut carbon emissions, according to an investigation by the Sunday Telegraph.
The survey found that 3,080 miles of motorways and trunk roads in England are now completely unlit, with a further 47 miles - including a busy stretch of the M1 between Luton and Milton Keynes - dark between midnight and 5am.
And some 98 of 134 councils questioned (73%) said that they had switched off or dimmed lights, or were planning to.
All of England's 27 county councils have turned off or dimmed street lamps in their areas, said the paper, on the day when the clocks went back, plunging the country into darkness earlier in the evenings.
The survey found that 70% of the motorway network is now unlit at night, saving the Highways Agency some £400,000 last year and reducing carbon emissions.
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.
Deputy Prime Minister Nick Clegg will today deny splits within the coalition Government over carbon emissions reduction, as he announces a £100 million investment in energy efficiency.
Speaking to an energy conference in London, Mr Clegg will say that ministers are "unreservedly committed" to helping the low-carbon sector thrive, insisting that "no-one in Government" wants to depart from the programme to decarbonise Britain's economy as part of the fight against climate change.
Mr Clegg will tell an audience of business figures that the UK is "leading from the front" in a global revolution towards cleaner sources of energy.
He will announce a £100 million contract by UK Green Investments with fund managers Equitix and SDCL to provide initial funding to encourage foreign and domestic investment in non-domestic energy efficiency.