All I know is that the polar ice is melting at an increasing rate, and islands are disappearing and some coastal cities are experiencing flooding during high tides. Miami, for example. It won't be long before a total disaster. This brings up a question: Have any studies been done on how we can deflect heat (or is it radiation?) from the poles, in order to refreeze the water there and prevent sea level rise? Particularly Antarctica. Are any BIG space projects on the drawing board? It might require a gigantic international effort, as I don't know how much work it would require, but I believe it is our last hope. The half-life of the added heat in the ocean is 50 years! Deflecting heat from the poles I don't think is going to solve ocean acidification, but it might save millions of lives by preventing coastal cites from going underwater.