Recently , three mysterious holes were discovered in the Siberian permafrost . David ##off : Hot summers caused buildings to spew methane , resulting in explosions . what we thought just seven years ago . He says airborne pollution is more potent in producing greenhouse gases . Weisman : Such stunning global flatulence is deadly if we do n't embrace green energy .
Recently , three mysterious holes were discovered in the Siberian permafrost . David ##off : Hot summers caused buildings to spew methane , resulting in explosions . He says airborne pollution is more potent in producing greenhouse gases . Weisman : Such stunning global flatulence is deadly if we do n't embrace green energy .