Alex Mair asked:
Quick question, assume in the future all cars are run on hydrogen. The only biproduct is water. I'm guessing the oxogen from the water comes from the atmosphere. Will this upset the balance?
Regards, Alex Mair,
We put this question to Professor Stephen Bennington from the Rutherford Appleton Laboratory...
It shouldnít do because itís recycling it. So I mean you're taking water, you split it up into hydrogen and oxygen, and then you recombine them again in your car. So, the net effect is zero. Water vapour is different perhaps because if you're using these things to power jets up in the high atmosphere and then you're depositing water vapour up there, and thatís a greenhouse gas. So we have to think carefully about those problems. Itís probably not a problem, but it could be.
Alex Mair asked the Naked Scientists:
Geezer - You wrote: "As long as the hydrogen was produced by separating water into hydrogen and oxygen, there would be no net change in oxygen." Wrong.
Geezer - We are just pondering technicalities. The question posed does not stipulate how the electrolysis will be accomplished. However, ALL currently 'so called' reneuable sources are HEAVILY dependent, and often subsidized with fossil fuels. Nuclear power could not exist without fossil fuels. Wind turbines are MADE out of the stuff.