An Inconvenient Truth

Went to see this movie last weekend. I can recommend it.

The clincher for me wasn't the pictures of receding glaciers and dried up lakes, powerful as they were. What got my attention was the graph of CO2 levels, derived from Antarctic ice cores, covering the last 800,000 years. (Similar to the one below.)

Current C02 levels are way above the highest levels for that period. Projected levels for 2050 are literally off the graph.

The planet is not approaching something unprecedented. We're already there.

Graph from http://news.mongabay.com/ Click to enlarge.