Depends on what MPG the car you would have been using get.
One days worth of gas.
A lot. Water would be saved in enormous amounts, and so would grain that goes to animals for feeding.
how much would it wy if you saved all the skin you saved
Well it would increase if everyone started using more than one napkin
all of it!, a bike doesnt use any gas ;-D
Yes, but a pit bike has much small wheels so I would be careful.
how much would it cost you for 2 houres on a velbil bike
A dirt bike would cost about 100 dollars in MX vs. ATV untamed.
A good race mountain bike would cost you about $6,000 to $10,000
Depends entirely on how much riding the person does, and what the person would have done otherwise. If the person is riding a bicylce instread of using an motorized vehicle, then some CO2 will be saved. If the person is riding instead of walking, then there's no difference.
You would have about $52,000.
22 to 27 lbs
£100-£150