Aerosols
I’m confused about aerosol sprays. They have been labeled one of the worst enemies of the ozone layer, producing nasty destructive chemicals by the truckload, and yet there are now aerosol cans that specifically say “environmentally safe.” How can this be? Are there different kinds of propellants used? Two related questions: Why can’t aerosol products be produced in a simple pump-spray version, and can you recycle aerosol cans like other cans? –Larry Axelrod, Chicago
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I don’t want you to feel like you’re completely out of it, Larry–I am always solicitous of the Teeming Millions’ feelings–but the ozone-destroying chemicals in aerosols (chlorofluorocarbons, or CFCs) were banned in 1978. Today propellants like propane, nitrogen, and carbon dioxide are used instead. If it’s any comfort, a lot of people are under the same misimpression you are. CFCs are still used in things like auto air conditioners, but they’re supposed to be totally phased out by 1995.
Advances on the Anti-Boom-Box Front
Your recent column about using EMP [electromagnetic pulse] to combat “boom cars” [February 26] shows real forward thinking. Your tax dollars are already being applied to this problem. Federal scientists have the fix at hand. Once again, you are both ahead of and behind the curve. –Rob Mohr, Chicago
