“The environment may not be as fashionable an issue now as it was when David Cameron attached a wind turbine to his house,” Miliband said in the letter, referring to Cameron’s 2010 general election pledge to create the “greenest government ever.”
The opposition leader said that a Labour government would make the UK's electricity supply carbon free by 2030 if they won the 2015 general election.
Miliband also declared a goal for the United Kingdom to become a world leader in green technology by 2025 and create some 1 million new jobs in the energy market.
The Labour leader further slammed the Cameron government for not mentioning climate change issues in the annual Autumn Statement delivered on December 3.
Miliband's comments came in light of the ongoing Lima Climate Change Conference in Peru, which is a build-up to the 2015 UN Climate Change Conference in Paris. The event is aimed at achieving a legally binding universal agreement on climate change. EU countries, including the United Kingdom, have pledged a 40 percent reduction on carbon emissions by 2030.
According to a recent report by a UN panel, Paris is the "window of opportunity" for countries to meet their climate change targets.