Around the world, scientists are finding trace amounts of substances—from sugar and spice to heroine, rocket fuel, and birth control—that might be having unintended consequences for humans and wildlife alike.
Campaigners against global warming have drawn on an arsenal of visually startling tactics over the years, from posing nude on a Swiss glacier to scaling smokestacks at coal-fired power plants.
On Saturday, they tried something new with the goal of prodding countries to get serious about reaching an international climate accord: a synchronized burst of more than 4,300 demonstrations, from the Himalayas to the Great Barrier Reef, all centered on the number 350.
The world has less than five years to get carbon emissions under control or runaway climate change will become inevitable, the World Wildlife Fund (WWF) has warned.
Scientists generally agree that the world could keep temperature rises below a dangerous level of two degrees C (3.6 degrees F) if greenhouse gas emissions are halved by 2050. However a new report from the WWF found this will require a "green industrial revolution" by 2014, with heavy investment in moving from fossil fuels to 'low carbon alternatives' like wind, solar, nuclear and clean coal.
The 2007 draft suppressed until now calls for regulation of greenhouse gases, citing global warming as a serious risk to the U.S. A finding by the Obama administration is nearly identical.
Reporting from Washington - The Environmental Protection Agency on Tuesday released a long-suppressed report by George W. Bush administration officials who had concluded -- based on science -- that the government should begin regulating greenhouse gas emissions because global warming posed serious risks to the country.
Scientists have warned of an alarming increase in the extinction of animal species, because of threats to biodiversity and ecosystems.
The threats are posed by pollution, climate change and urban spread. The comments come two days ahead of a meeting of the Diversitas group of global experts on biodiversity in the South African city of Cape Town.
The UN's climate chief has warned that time is running out for negotiators to agree on crucial targets for reducing greenhouse gas emissions.
With two weeks of talks due to wrap up in Bangkok on Friday, Yvo de Boer said a deal at the Copenhagen summit in December may not be possible without commitments by developed countries to significant emissions cuts and financing for poorer nations to do the same.
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