This is a dangerous thing. Who is "we". If it's the government that's a bad idea. Government solves nothing. It may put a band aid on a problem, but they solve nothing. it is the ingenuity of the people and the push from consumers that should drive this sort of thing, not a government mandate. Let's face it, the people of the US (and probably other countries) are demanding more fuel efficiency, driven by the cost of gas, and the automakers are responding by designing more hybrids and seriously taking a look at electronic[/url] and fuel cell [/url]vehicles. That was driven by the market, not by the Government.