All Environment
Are EVs worth it? Study helps calculate savings on emissions, fuel.How much an EV saves on fuel or cuts greenhouse gas emissions depends on many variables, including gas prices and whether the local electric grid is fed mainly by coal power. The Union of Concerned Scientists helps out with the calculations.
Ice age study delivers blow to global-warming skepticsA new study finds that rising levels of carbon dioxide drove rising temperatures at the end of the last ice age. The findings contrast with previous studies, which skeptics of human-triggered global warming said showed that CO2 levels weren't an important factor.聽
Climate change report: time to start preparing for the worstIt's time to start protecting people from the impact of severe-weather events, a panel says. The report offers further evidence of how the climate change conversation is shifting.聽
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.聽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.