It's not just altruism that's driving these business titans. Their plans will help the bottom line. Take the solar systems the Patriots, Giants, Jets, Redskins, and others are installing. About a year and a half ago, David Crane, CEO of the New Jersey-based energy provider NRG (NRG), approached the NFL about converting to renewable energy. NRG, with $9 billion in revenue and a fleet of coal, gas, and nuclear power plants, says he believes that solar will be a disruptive technology. The problem, explains Crane, is that solar, which still counts for less than 1% of U.S. power production, wasn't gaining any traction. If he could get the NFL to embrace solar, he could use America's most popular sport to help spread the word. His pitch: At no capital expense to the NFL owners, NRG would install panels at their facilities. For the deal at Foxborough, Mass., one of seven NFL locales NRG is wiring, the Patriots get to hedge against rising electricity prices by locking into a long-term fixed-price contract.