Fuel cells are the most environmentally destructive concept proposed by man!

If you want to produce hydrogen on a large scale it has to come from electrolysis of water, to split water into H2 and O2. To do that you need electric energy, produced by burning coal at 30% efficency. With your hard earned(and polluting) energy, you make H2 at no more than 50% efficiency, so you are down to an overall 15% efficiency. You then store it, again loose half, and then in your car you cosume to produce back electricity, again at about 50% loss, so you total efficiency is no more than 3%. Coal fired steam engines are better than that.

Hybrides, Toronto TTC just complained that the life time of the batteries were only about 18 months instead if the promised 3-4 years, and that the fuel savings were only 10% relative to normal busses. This does not include all the energy wasted on all the added maintenance, pulling dead busses off the roads etc, overall no energy gains.

Pure electric cars, great we don't have excess electric energy to spare and battery technology is still limiting.

Investment opportunities, sure, great it will take time for the masses to realise this 'environmental' scam. Lots of money to be taken if done right.

Global warming is not the real issue, CO2 emissions will drop as we run out of fossile fuels. Global warming has been around for 7,000 years since mankind starting to burn forest to clear land. Without any form of global warming, we would have ice all over. Water vapor is the main global warming gas.

The main issue is that we are running out of fossile fuel, although very slowly, since we have tar sands as well as oil schales. What we need is a real energy blueprint going forward, and the only sources of energy are fossile fuels, hydropower, nuclear, geo, tide, solar and wind. If we want to go heavy into electric cars, we need better battery technology, but even more importantly means to produce huge quanties of extra electric energy. That wil take decades!