Engineers at Goodyear recently showcased an energy harvesting solution, a concept tire called the BH-O3. The BH-O3 is a tire with an inner coating that generates energy from the tire, which is then fed back into the car's electrical system. The material, which the promotional video doesn't describe, can generate electricity in two ways, either from the tire being squished against the road as it moves or from the tire heating up. The heat can be generated from anything, from sitting in a hot parking lot or sedately driving down the road, to doing doughnuts. Obviously, the company is eyeing the Texas/Arizona/Dear-God-Can-It-Really-Be-This-Hot market.