[NaughtiusMaximus]

I guess all of that heavy breathing as you pedal uphill puts too much CO2 in the air.

LOL!

[Nathan Zachary]

"I guess all of that heavy breathing as you pedal uphill puts too much CO2 in the air."

Hey! That's a real concern! All those fitness freaks are adding billions of tons of CO2 to the air each year, and causing "gore bull warming". They should have to pay a carbon fitness tax to stop this "gorebull warming".

The average couch potato is the least CO2 producing type of human, producing about 1/2 ton of CO2 per year. The fitness freak, marathon runner, cyclist etc. produces 10 times that much, about 5 tons min. CO2 per year!