Efforts outside the US tend to amount to 1.5 percent of GDP or less, one tally finds.
Although commodity prices for a wide range of crops have fallen by as much as 50 percent from record highs in June, the financial crisis is expected to make food shortages dramatically worse.
July's storms bolster forecasts for a very active year.
Sylvia Schenk, a lawyer and former Olympic runner, is trying to rid sports of drugs by getting sponsors to force athletes to submit to testing.
Even though manual scavenging was banned in India in 1993, thousands still perform the task of cleaning, by hand, human waste.
Linabel Sarlat runs a support center to help bring economic and spiritual renewal to the women of Anapra, Mexico.
Among the things Muslims admire are the West's technology and fair political systems.
Many cite the equal importance of democracy and Islam to the progress of the Muslim world.
Many Muslims believe that women should have the right to vote and to hold any job outside the home that they qualify for.
The Gallup Poll of the Muslim World is the most comprehensive study ever done of this group. Many key results counter conventional wisdom.
When asked why they supported the 9/11 attacks, the radicals gave political rather than religious reasons.
The German research effort is one of the first to attempt 10-year climate forecasts.
Methane levels in the atmosphere rose in 2007 after 10 years. Scientists are trying to find out why.
Eco-minded Scandinavians crave winter vacations. Yet the long flights add to greenhouse gases. Should they hit the beach or save the planet?
His call for US emissions to stabilize by 2025 marks a policy change, but is still behind other nations.
The president says the level will stabilize by that year, but he sets no cap.
Key question: Is air pollution from lower latitudes causing the region's recent warming?
A new study underscores the difficulty of estimating global warming's effect on weather.
Should the world put less focus on emissions caps and more on spurring clean technologies?
Scientists say the breakup is a harbinger of what's to come if the region continues warming.