Fuel cells are not an energy producer but a storage device. As you say you need the sun (or whatever) to charge them. They are not efficient.

Even the oil companies are admitting to low reserves now in industry magazines and papers.

The short term problem is not oil supply, but *cheap* oil. Then supply probelms kick in at a later date.

There is not enough investment in renewable energy. One of the most promising schemes in the UK (up north somewhere) was shut last year because the gov't wouldn't give them £10m, but could spend hundreds of millions on a war for oil. Go figure.

How do you smelt metals etc. to make new wind-turbines when all the fossil fuel has gone?