It won't be the death of the SUV. I just means that they are going to have to come up with some more innovations when it comes to cars to make them more fuel efficient. That could mean a number of things though. Just as what was brought up in another thread about when we had gas shortages years ago, we lost muscle cars for a little while, we finally bounced back and they are better than ever. This just forces companies to "go for the gold," when it comes to the next best thing.
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