Jun 06 U.S. on Track to Break Tornado Records This Year By PBS News Hour The first half of 2008 has already marked the deadliest tornado season this decade. As many as 1,000 tornadoes have already touched down in the U.S. since January, more than the country sometimes sees in a full year. Continue reading
Apr 01 Scientists Plot Pollutants' Path at the Arctic By PBS News Hour The Arctic is a receptacle of the planet's air pollutants -- from forest fires to human-produced carbon dioxide emissions -- and a coordinated international effort is geared toward learning more about pollutants' effects at the top of the globe. Continue reading
Sep 14 Arctic Ice Melting at Growing Rate, NASA Finds By PBS News Hour NASA-funded studies conducted last year found that sea ice present year-round in the Arctic is melting at a rate of 9 percent per decade, and in two recent summers, the ice was at record lows. Continue reading