All Environment
- Top 5 nations that use renewable energy Here are the top users of renewables, not counting biofuels or hydroelectricity. Numbers indicate country percentage of total global renewable usage.
- Sea level studies: US coasts even more vulnerable than previously thoughtSouth Florida, southern Louisiana, and the Carolinas top the list of states with the most land to lose if sea level rises 1 meter, according to a pair of new studies.
- Greenland's ice sheet: Climate change outlook gets a little more direIf temperatures reach 1.6 degrees C above preindustrial levels, the iconic ice sheet will probably tip toward irreversible loss. With climate change, temperatures have already risen 0.8 degrees C.
- California ready to cut greenhouse gases. Next, doing it.After five years, California has put in place rules to cut greenhouse-gas emissions statewide back to 1990 levels. But lingering effects of the recession have pushed implementation back a year to 2013.
- Hey, what happened to winter? What its wimpiness portends for spring.Despite a few powerful snowstorms, the winter of 2011-12, with record-breaking temperatures and less precipitation than normal, has been the fourth warmest on record in the US. What gives?
- Hybrid cars 101: How long should batteries last?Owners complain that some hybrid-car batteries conk out early. What is the lifespan of a hybrid battery?
- Five hotbeds of biodiversity Here are five flora- and fauna-rich ecologies that Conservation International, a nonprofit organization in Arlington, Va., says are more than 70 percent intact.
- Ice caps not shrinking as much as once thought, new data showMountain glaciers and ice caps around the globe collectively lost 148 billion tons of ice a year, according to new satellite measurements. The rate is 30 percent lower than scientists thought.
- Cover StoryWind power: Clean energy, dirty business?In the developing world, where land-intensive wind turbines are being rapidly constructed, wind power has often turned clean energy into dirty business.
- The 'wind rush': Green energy blows trouble into MexicoGreen energy's big success is a rude awakening in the isthmus of Mexico.
- Carbon dioxide super-scrubber? Potential good news in global warming fight.Scientists have announced a potential breakthrough in developing a new material that removes carbon dioxide from the air. CO2 scrubbing could be a useful tool against global warming.