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Choose one... 'Trees of life' are vital Shutting out pandemics Waiting for the revolution Talking rubbish Energy saving pays Earning their stripes Watching whales and whalers China's no eco-villain' Saving seas for mammals Leading by example Ghosts of the oceans Think smart on energy Powering out of poverty Biodiversity: Life's spark Rainforests' El Dorado Salute the local heroes Time for carbon markets No way back from eco losses Carbon labels' taxing time Balancing act for meat Copenhagen calling Warming's cold reality Big answers for big problem Hungry for biotechnology Where should elephants go? Diversity: Eat or lose it Feasting on festive spirit Ozone feels the heat Our writers talk back Turning carbon into gold Baby boom or bust? Paying for climate curbs Keep efficiency burning Recipe for reef rescue Earth needs all its friends People power on climate Low-carbon 'no luxury' Need for nature's capital Climate focus 'good news' Adapting to what climate? MDGs' would-be crisis Putting money in trees Bold reform time Value of saving species Water limits growth Food security heats up Primates on the edge Time for biomass Roosevelt revisited Wildlife: A luxury? Snared in NitroNet Writers talk back Mechanics of climate curbs Roots of the food crisis Taxing time for climate Re-energising nuclear power Time to leave comfort zone Greens forget their roots Urban areas need rethink Small change not enough Standby ban 'misses point' E-Day: Good use of energy? White wilderness needs care Blair: A roaring success? Cull fears miss big picture Green ideas for Mr Darling Saving our urban trees No magic zero carbon bullet 'Greenwash' loses its shine Consumers can save forests Society needs more for less Farming must return to root Seeing wood for trees Redefining nations The logic of green giving Fish - less can be more Hold the climate fixes Stop the climate blame game Our writers talk back Forest power to the people Powering up hydrogen Seeds of farming's future Humanity is the big test Waterways' golden touch Seeing carbon for the trees Local touch for climate IT crowd must go green Ozone effort still needed Conservation 'not enough' Hogs losing suburbia home Tune in to the real world Pulling the plug Sport's slippery slope Carbon focus 'misses point' Carbon offsets do matter Sex sells, but at what cost Turning Gordon Brown green A smart way to save energy Squeeze of compact cities EU 'must walk climate talk' Switching on nanogeneration Move whaling debate forward We need the right chemistry Bidding for climate control Climate 'needs devolution' Science key to green future Monster warning for oceans Taxing the carbon dodgers Climate pain as oil era end Celebrate the Enviro Union The devil in the retail Biodiversity 'key asset' It's not just about climate Farmers 'hold green key' US cities lead the way Rampant life upsets order Climate: Time for action Poorer nations need cloning Writers talk back A blue revolution Alaskas left in the cold Care at Christmas? Climate: Irony in the USA Eco-tourism: Sustainable? Green Room: Over to you! Sceptics: Speak up! SD: Big not boring Necessity of fusion 'Obscenity' of carbon trade Act now on climate Hunting for conservation Where are all the leaders? Has fish had its chips? No hunger from biofuels GM: Liabilities, not assets Biofuels: The grim reaper? Gore: A convenient matter Water abuse costs the Earth Lighting in the Dark Age Clean coal for energy gap Welcome tree-hugger Homer The forgotten war on waste Share car, save planet Conservation back to roots The illness in Planet Earth Losing the primal link Blagging in the blogosphere Politicians write back Conservative business plan Lib-Dems: Bringing change Labour's green contract The fair climate solution Greens: Out of the woods! Africa's climate burden Shedding light on bulb ban The end of the beginning? Recycling: Vapid ritual Micropower to the people! Praising a plastic hero Food miles: Too simple Scruffy is the new green In thrall to the green god The value of the last Reality flies from bird flu Carbon addicts and debts Light bulbs: Not too bright All silent down at the pond Returning the Arctic favour Labouring for green planet Too crowded for Utopia