Market Watch: Institutional investors are committing billions of dollars to investments in climate change and are embarking on a bold new action plan to raise the profile of energy efficiency and clean technologies around the world. Nearly 50 leading U.S. and European investors representing more than $8 trillion of assets met on Feb. 14 at the United Nations to lay out a timetable for their commitments to global climate change and to call on governments and other investors to act with their money …