COPENHAGEN, Denmark (AP) — A Danish official says the Nord Stream gas leaks in the Baltic Sea could emit the equivalent of one third of Denmark’s total annual greenhouse gas emissions. That would also be five times the amount of the potent greenhouse gas as was emitted during the Aliso Canyon well disaster in California in 2015-2016. A chemical engineer estimated the amount will turn out to be less, but still double what escaped at Aliso Canyon. Methane is a very potent greenhouse gas, able to warm the atmosphere 82.5 times more than carbon dioxide.