Here's is a very simple answer to the question of: is global warming taking place? Is the net effect [including the winter grow-back] that more ice has melted? Is the amount of total ice getting less each year? A fifth grader could answer these questions.
A second study suggests even larger amounts of frozen methane are trapped in lakebeds and sea bottoms around Siberia and they are starting to bubble to the surface in some spots in alarming amounts, said Igor Semiletov, a professor at the University of Alaska in Fairbanks.