That is a misnomer. Oil accounts for about 22% of our GDP. Fact is, GDP per capita is only so much higher than that of the US, about 10% I'd say.
We can "afford to be environmental" the same way any country would be able to afford to be.
The real difference is our wealth distribution which is leaps and bounds ahead of most of the world, here in Norway a higher percentage of the population are simply able to afford the car and that is what we're seeing in Tesla's market share.
GDP per capita 2012 for Norway: $99,557. US: 49,965. (Sweden: $55,244)
The last decade has been exceptional, though part of the reason is the NOK is vastly stronger against the dollar than it used to be (then again part of the reason for that is that the Norwegian economy is as strong as it is)
(EDIT: that's World Bank numbers, btw. IMF and other sources give slightly different results, but the relative difference is pretty much the same; if you factor in purchasing power parity, the gap is substantially closer, though)
That said, Norway is very smart. They correctly perceive that GDP from oil production isn't really income, but rather simply liquidation of assets. They know they can't afford to spend that money, so they save it (effectively turning it from one kind of asset into another).
Also, having access to cheap oil/your own oil is probably not the best stimulus for electrical car ownership, so I think there's definitely more going on than that :)
Only because it is placing heavy taxes on fuel (which I think is a good thing). Compare with other oil-producing nations, which don't do this. Also, the US has really low gas prices.
We can "afford to be environmental" the same way any country would be able to afford to be. The real difference is our wealth distribution which is leaps and bounds ahead of most of the world, here in Norway a higher percentage of the population are simply able to afford the car and that is what we're seeing in Tesla's market share.