Conservative MP Zac Goldsmith has highlighted that party leaders "fought to prove they were the greenest" during the 2010 General Election campaign.
Calling them "muppets," he wrote on Twitter:
In 2010, leaders fought to prove they were the greenest. 3 yrs on, they're desperately blaming their own policies on the other. Muppets.
His comments came after David Cameron promised to roll back "green regulation" imposed by the Labour Government