One of the top dogs on Wall Street, Goldman Sachs, is licking its paws clean with plans to invest a whopping $150 billion into green energy over the next 10 years. By nearly quadrupling its earlier pledge of $40 billion, the investment bank is making it clear that the best long-term bet is in the clean energy market despite its current ups and downs. The investment will go towards clean energy projects and technologies in solar and wind farms, as well as energy efficiency upgrades for buildings and power grid infrastructure. Goldman Sachs also said it seeks to finance clean energy for the developing world, like home solar panels and clean cooking stoves.