This is a guest post from Ali Partovi, angel investor, startup advisor and serial entrepreneur. He co-founded iLike, acquired by Myspace in 2009, and LinkExchange, acquired by Microsoft for $265 million in 1998. His portfolio has included successes as far-ranging as Zappos, Facebook, DropBox and OPOWER. Around Earth Day, we’re reminded about global warming and pollution, as well as the “green” technologies and consumer choices that may save our planet.