pollution

Science, Tech & Environment

Rising carbon dioxide levels may reduce the nutritional value of important foods

Rising levels of atmospheric CO2 are already having significant impacts on climate, weather patterns and water supplies. Scientists expect increased carbon dioxide levels will also affect agriculture across the world, in ways we can't predict. The results of a recent study suggest that one of those affects could be quite alarming.

Science, Tech & Environment

Cows, sheep and global warming

With 2009 likely to be a crucial year for international climate change negotiations, there's increased attention on the role agriculture may play in driving up global temperatures. Cows and sheep produce a LOT of methane, and scientists are looking at new ways to cut such "emissions". The BBC's Matt McGrath reports from Dublin.

Global Politics

Green adventures

The World's Laura Lynch meets an eco-adventurer who's combined low-tech and high-tech to turn a scrapyard bus into a green mobile home. Now he's planning a voyage around the world using sustainable fuels and a low-carbon budget.

Global Politics

Climate: getting concrete in Beijing

On Tuesday, President Obama and his Chinese counterpart Hu Jintao agreed to cooperate on climate change and other important matters. Anchor Jeb Sharp talks with David Biello, the associate editor for environment and energy at Scientific American magazine.

Global Politics

China in Copenhagen

China has resisted calls for it to agree to binding verifiable targets for reducing emissions. But people in China say their government should be willing to make a commitment in Copenhagen. The World's Mary Kay Magistad reports from Beijing.

Science, Tech & Environment

Ship perched precariously

The maritime authorities in Australia are trying to stabilize a coal carrier which has run aground near the Great Barrier Reef. The Chinese-registered ship is balanced precariously and the fear is that it could spill hundreds of tons of oil into the sea.

Global Politics

Lessons from global oil spills

Oil continues to spew into the Gulf. Oil spills are a global phenomenon. We may be able to learn from previous spills and from the efforts to clean them up. Marco Werman talks with Jay Holcomb of the International Bird Rescue Research Center.

Science, Tech & Environment

Rising carbon dioxide levels may reduce the nutritional value of important foods

Rising levels of atmospheric CO2 are already having significant impacts on climate, weather patterns and water supplies. Scientists expect increased carbon dioxide levels will also affect agriculture across the world, in ways we can't predict. The results of a recent study suggest that one of those affects could be quite alarming.

Science, Tech & Environment

What deteriorating air quality looks like around the world

The Chinese government announced Monday that it plans to take more than five million vehicles off the road to improve air quality, including 330,000 cars in Beijing. This announcement comes only weeks after the World Health Organization announced that only 12 percent of cities reporting on air quality meet their standards for safe levels. With the help of our newsroom designers, we put together a list of places recently affected by deteriorating air quality and incidents of smog.