Planetary perspective

TigerHawk

The scariest thing we have learned about climate change -- not admitted by most people who want to shape public policy on account of it -- is how little control we have over it. The sun can twitch ever so slightly in either direction and humanity confronts a demographic disaster. A bit too cool, and the most agriculturally productive areas suffer severe crop failures. A bit too hot, and the vast numbers who live at sea level have to migrate at somebody else's expense.