Atmosphere

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Canada Must Put a Price on Carbon Emissions

Whenever I meet a Hummer, tension rises in my chest, unkind thoughts develop in my head and my hands tighten and tremble, as if they want to signal something. I've long wondered why that happens, and I think I've finally figured it out. It has something to do with a song, economics and the courteous way to walk your dog.

Beware the Germs in the Air

It's been known for some time that germs can be found in the atmosphere and they have made clouds a happy home. But more important than how they survive is the question of which germs are surviving and whether they pose a threat to our health.