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.

Global Politics

Arctic warming

Arctic temperatures in the 1990s reached their warmest level in at least 2,000 years A new study being published in Science Magazine concludes that cooling was reversed because of increased emissions of green house gases. The World's Katy Clark reports.

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.