The CO2 myth: if the canary is still singing, we're okay...

Last weekend I took a whirlwind trip to Chicago. While there I visited the Museum of Science and Industry. It’s an amazing place, with full-sized airplanes, a full-sized combine, a full-sized train engine, and an entire German U-boat, the first U-boat ever captured.

But for me, the highlight was taking a tour through a replica of an old coal mine. 

After descending "deep into the bowels of the earth," we were given a safety talk. The tour guide pointed to a tiny birdcage which, in one of those old-time mines, would have housed a canary. More...

See also:

1. Crops under stress as the weather ... cools???
2. Al Gore's global warming nonsense: cults, prophets and fanatics...
3. The Great Global Warming swindle...
4. Al Gore's global warming CO2 Scam...