Point 3 is the one that matters. We still have the ability to keep our current civilization alive. We don't even have to change our life style at a large scale.

Point 3 is the one that matters. We still have the ability to keep our current civilization alive. We don't even have to change our life style at a large scale. Switching from coal and oil to solar and wind should be a no brainer. It is even widely cost-efficient. People, who think that a few windmills are an offensive sight, are not considering how different life for all of us would be, if we do not act in time.