Reuters: An environmental start-up backed by Al Gore’s venture capital firm aims to take advantage of coming U.S. climate change legislation by helping companies like Coca Cola and even cities cut pollution. Hara, a 25-employee company that debuted in 2008, provides online software to help companies reduce their carbon footprint — a $2.5 billion market that will grow 10-fold if the proposed energy bill, which will require companies to get permits for emissions, becomes law, Chief Executive …