Sometimes you can be too good. Case in point: the HY Mini is a wind-powered charger for your gadgets, so that when you attach it to yourself when your running or your bike whilst you're riding it collects power. You can then connect it to your mobile, PDA or MP3 player and use the juice to eek out a little bit more talk or listening time.
Apparently, riding your bike for an hour gets you an extra 15 minutes on your mobile. Alternatively, attach it to your car window and drive for the same amount of time and you can get 40 minutes. Huh. Tough choice.
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"Alternatively, attach it to your car window and drive for the same amount of time and you can get 40 minutes."
And the increased wind resistance will increase your fuel consumption by a lot more than just plugging it into the mains - ecologically sound? I think not.