During biking season I get asked quite frequently why I commute by bike.  I usually give two reasons:

1. To save the planet.  One person riding a bike won’t make that much difference directly.  However, hopefully I’m spreading the word that getting around on your own power is possible, and perhaps other people will give it a try.
2. In the event of global catastrophe, hopefully I’ll be in good enough shape to survive.  First the sun ejects a happy large ball of plasma, then we see a flicker of colorful light, a few jolts of electricity, then darkness.
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