The site has sections focusing on transport, climate change, conservation, ethical shopping and energy use.
It also features links to third-party sites and directories suggesting ways to improve the environment.
"The site aims to provide a one stop shop for a greener lifestyle, drawing together existing online resources in a coherent way and encouraging users to interact by sharing their own ideas for greener living," said Hilary Osborne, site editor.
"Over time it will develop and our ambition is to provide users with the definitive source of guidance on green activity."
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