Green light: Biodiversity, butterflies and bike rage

Biodiversity • Back Biodiversity 100, save our wildlife • Chaco deforestation by Christian sect puts Paraguayan land under threat • Study identifies more than 1 million ocean species • Kyra Choucroun: Biodiversity and profit can go hand in hand • Patrick Barkham: My search for the purple emperor butterfly Climate change • China calls on rich nations to improve emission targets • Prince of Wales calls for revolution – albeit a sustainable one • White House goes green with solar panels • Pope's UK trip hands embattled environment departments £3.7m bill • No Pressure: the fall-out from Richard Curtis's explosive climate film • Stewart Brand: My plan B for climate change Competition • Win a country break for two with Bovril's Great Outdoor Revival Enter our fantastic competition for a chance to win a weekend away at a cottage, one of 10 National Trust passes, a pair of hiking boots or a year's supply of Bovril Multimedia • Exclusive video of 10:10 campaign's 'No Pressure' film • In pictures: Your photos of nature's harvest • Video: Pineapples at what price? • Audio: The bike podcast: Podium girls, bike rage and the Brompton • In pictures: New species discovered by British Antarctic Survey • In pictures: Veolia Environnement Wildlife Photographer of the Year 2010 Green living • Are ebooks greener than paper books? • You ask, they answer: Burt's Bees • 10,000 Birmingham council homes to get solar panels Best of the web • BusinessGreen: UK backs EU plan for controversial 'beyond A' energy labels • SolveClimate: North America's risky race to exploit oil sands and shales • Conservation magazine: How biochar production could help climate change fight For more of the best environment comment and news from around the web, visit the Guardian Environment Network . ... And finally • Poo power to heat homes A pilot project at a sewage plant in Didcot becomes the first in the UK to produce domestic gas from human waste