EarthMass extinction blamed on fiery fountains of coal One of Earth's worst-ever mass extinctions may have been caused by carbon dioxide released by exploding mixtures of magma and coal ¿ìè¶ÌÊÓÆµ
EarthAdopt green tech by 2014 to avert climate calamity The world will have to switch to a low-carbon economy within five years or risk runaway global warming, says WWF ¿ìè¶ÌÊÓÆµ