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

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.

Global Scan

Even Mandela meets his heroes in heaven

One of Nelson Mandela's own heroes, boxer Baby Jake Matlala, died just two days after the former South African president. While those two may be meeting in heaven, down here, people are analyzing Mandela's memorial service — from Obama's handshake with Castro to a man who pretended to interpret the ceremony for the deaf. And China tries a positive spin on its pollution, all in today's Global Scan.

Conflict & Justice

Rethinking biofuels in Europe

Biofuels have been touted as the best hope for reducing reliance on fossil fuels and limiting greenhouse gases. Now many scientists are raising doubts about that. Reporter Kathleen Schalch examines the debate over the costs and benefits of biofuels.

Global Politics

Europe's high speed rail

President Obama's stimulus plan includes billions to help jump-start a new network of high-speed trains. But the future of rail is already a reality in other parts of the world, including Japan, China and as Kathleen Schalch reports, the European Union.