Prince Charles has cut his global warming emissions by 9 percent in the past year, according to an annual review (printed on recycled paper with vegetable-based ink) of the prince’s accounts. Charles has been carbon neutral since 2005.

More trains trips, less plane trips, and a Jaguar and Land Rover that run on cooking oil have sliced his footprint. He also farms organically, and gets electricity from renewable sources at his Highgrove estate.

Charles and his wife, Camilla, have promised to cut emissions even further. Future plans include converting the royal train to biodiesel fuel (Europe’s first biodiesel-powered passenger train – Virgin Trains – left the station earlier this month, a project of Virgin’s Sir Richard Branson).

Tony Juniper, director of Friends of the Earth, praised the prince’s leadership:

"The fact that he reduced his carbon emissions by 9 percent in the last year alone highlights the potential for making rapid cuts in the nation's contribution to climate change.”

Others are more critical. Charles took heat a few months ago when he flew to New York to receive an environmental award. The prince’s principal private secretary, Sir Michael Peat, explained that Charles uses carbon offsets like funding tree planting or renewable energy projects to balance out the travel. “We’re doing it the best way we can at the moment,” he noted.

CNN