Is there a meteorological Keystone? So, which of all of the meteorological phenomenons is the Keystone? Is it Snowfall, as in the absence of Snowfall, No more reflection of solar Heating back into space, that will contribute to the planets heating as to push it over the Critical point and cause MAJOR Climate change? Is it the Heating of the Oceans, wherein it is Now recorded that the Sea Surface Temperatures have increased slightly, will slightly More be what pushes it over the edge? Is there an 'Edge' to be Pushed over? Is there a Keystone in it all, at all? Is it atmospheric Change? ie Gas content, composition, Quantity or other? Other, any other?