Coca-Cola has pledged a "gigaton-scale commitment" to phase out HFC refrigerants by 2015.Photo: The Coca-Cola companyIf there's one thing Americans agree on in these divided times, it's the urgent need to move toward cleaner energy. Polls taken as recently as November show a majority of Americans favoring comprehensive energy reform that limits pollution, develops domestic sources, and stimulates renewable power. We're not likely to get comprehensive reform in the year ahead, but I still see strong paths toward a cleaner, more sustainable economy. That's because smart entrepreneurs are taking the lead. They see the "green" in green, and don't want …