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She may seem the most electable Democratic hopeful, but can voters be persuaded to trust her?
Some climate change deniers in the United States Senate have realised they are increasingly out of step with the public.
Leading scientists have complained that a <i>Wall Street Journal</i> article disputing climate change is akin to "dentists practising cardiology".
Environmental groups have praised US President Barack Obama’s move to limit uranium mining near one of the world’s natural wonders, the Grand Canyon.
Scientists are urging Canada to end its commercial seal hunt after declining ice cover from climate change sends death rates among seal pups soaring.
An Oceana report says most shark species are heading towards extinction, while many are still being caught and killed.
The international community has "made a mistake" with the intensity of its focus on the global HIV/Aids epidemic and lost ground on family planning.
United States airlines are wrong to think that they can force the European Union to back down on plans to make carriers pay for emitting carbon.
Nepal wants to lift itself out of poverty by expanding its tourism industry but there is no strategy for waste disposal
The Empire State Building announced it would meet all its electricity need with wind power.
The White House energy and climate adviser is due to step down in the next few weeks, a departure seen as a collapse.
China, cast as the wrecker of the UN climate negotiations last year, went some way towards rehabilitation.
Magnificent and wild, the grizzly bear of the American West has a fearsome reputation.
It looked like a pretty ordinary day on the water at the United States naval base in Norfolk, Virginia.
The US president gets tough over the oil spill crisis but still faces mounting criticism.
Industry bosses round on one another as senators turn up the heat.
The Obama administration has taken defensive action over early assurances that a sunken BP rig was not leaking crude oil into the Gulf of Mexico.
Deniers use hacked email extracts to deride global warming data.
New fuel regulations will force carmakers to produce vehicles that get an average of 11.5kpl — more than required by the cash-for-clunkers programme
The American stimulus package includes a great global experiment — to see whether such unprecedented spending can also tackle climate change.