Ok, YOU produce more than a tiny fraction. I'm 52 and out of shape. I can ride 50 miles if you give me all day, but no way am I putting out more than 1/10 of a horsepower. And NO WAY am I putting a generator on my bike while I'm riding it!
Yeah, but isn't it that the premise of the article is that you would combine energy from various multiple sources like, I don't know, 10-30 per house? Water flowing in pipes, generated heat, gathered kinetic energy?
It would be interesting to see some calculations how much could be gained that way.