Pollution caused by fossil fuels aside we need better fuel economy and alternatives to gas-guzzlers. Here in the US the highest legal speed limit is in Texas at 85mph about 140kph. In the EU it is at least 140mph, 230kph. The US has the best highway system in the world. To make that happen we let our trains lines decline with passenger trains almost nonexistent. So we are a second generation of drivers. To go anywhere you have to drive or fly neither of which is fuel friendly. There is only so much fossil available once it's gone it's gone. Mass transit in Houston area where I live leaves a great sucking sound they have built so many "freeways"(long narrow parking lots) there is no place for right-of-ways for light rail. There are now 3 ring roads around the city. The largest one takes over an hour to drive across the diameter at 60mph. Detroit created a "love" relationship with the automobile that has been fueled by polices of the government since WWII to create. It's taken 70 years to get here hopeful it won't take 70 years to fix it.