I recently attended a Investment outlook seminar (I have to being a Member Nominated Trustee of the company pension scheme), one of the speakers had an interesting view on the earths natural resources, he said he'd recently been in the US and had mentioned that oil reserves were low, and finding and drilling for new oil was becoming more difficult, meaning it costs more to drill and extract the oil meaning we could soon be looking at paying $200+ per barrel and fuel prices will rise dramatically.

So Steve, driving your Porsche may soon become a very expensive recreational treat!

He also mentioned that the development of China and India will affect the remaining supply of natural resources, and it was also said that at the US seminar the speaker had attended, a member of the audience had shouted out the we should limit India and China's oil consumption, although the current the US fuel consumption far exceeds both these nations combined yet the population of China and India are many times greater that US Population.

I think the future of cars has to be eclectic cars and not the Prius as it still requires gas to power it, the Honda Clarity with the hydrogen engine is I think the future for everyday cars, and this technology will save the Porsches, Astons, Bentley's and classic cars etc... Governments should be pressuring car manufacturers to produce more fuel efficient and environmentally friendly vehicles, and oil companies to make more investments into less damaging fuel or alternatives such as hydrogen pumps at filling stations.

As for the Global warming problem, it's obviously happening whether its as a result of natural evolution or human interference though it would be naive and foolish to ignore it.