Buy fuel-efficient cars
Sure, that huge SUV looks cool on the road. It also provides lots of space for your family and cargo and is likely to keep you safe in an accident. But well-designed smaller cars can provide space and safety too, especially with the availability of advanced electronic safety equipment, much of which is starting to appear on affordably priced vehicles. And guess what? The smaller car is going to use a lot less fuel. This saves you money and cuts down on the amount of pollution you produce, which is pretty much a win-win situation. Or buy a hybrid, which turns off its pollution-producing internal combustion engine every chance it gets.