Climate vs. weather: Extreme events narrow the doubts

Heatwaves, drought and floods that have struck the northern hemisphere for the third summer running are narrowing doubts that man-made warming is disrupting Earth's climate system, say some scientists.

Divides emerge in US, world response to mutant flu

A divide has emerged between the United States and the rest of the world on whether to publish or keep secret the details of an engineered mutant bird flu virus that can pass in the air between animals, health experts said ...

UN meets to mull climate change quick-fix options

On the heels of another halting round of talks on climate change, UN scientists this week will review quick-fix options for beating back the threat of global warming that rely on technology rather than political wrangling.

Japan doubles plant radiation leak estimate

Japan has more than doubled its initial estimate of radiation released from the crippled Fukushima nuclear plant in the week after the March 11 tsunami, ahead of the launch of an official probe Tuesday.

New Delhi schools shut because of toxic smog

An expert panel in India's capital declared a health emergency Friday due to air pollution choking the city, with authorities ordering schools closed until Nov. 5.

page 3 from 6