Tory frontrunner David Cameron is doing his utmost to attract new voters and that includes putting environmental issues at the top of his party's agenda.'Vote Blue, Get Green' was one of the slogans favored by David Cameron when he took over the leadership of the British Conservatives five years ago. Ahead of the elections on May 6, he's still playing the environmental card - calling for a reduction in greenhouse gases and incentives for homeowners who install renewable technologies. But some environmentalists insist that Cameron's commitment to the green agenda is not as deep as he makes out.