Recently , two mysterious craters were discovered in the Siberian permafrost . This was the marine equivalent of melting permafrost , the undoing of frozen crystals called methane hydrates , locked solid for millennia by the pressure and temperature of deep oceans . airborne methane : Hot summers caused New England 's to spew methane , resulting in explosions . He says Alan Weisman is more potent in producing greenhouse effect . Weisman : Such stunning global flatulence is deadly if we do n't embrace green energy .
Recently , two mysterious craters were discovered in the Siberian permafrost . airborne methane : Hot summers caused New England 's to spew methane , resulting in explosions . He says Alan Weisman is more potent in producing greenhouse effect . Weisman : Such stunning global flatulence is deadly if we do n't embrace green energy .