Looking for the next big opportunity in energy entrepeneurship and venture capital investing? Think water, argues Bill Aulet, a senior lecturer at the MIT Sloan School of Management and Entrepreneur-in-Residence at the MIT Entrepreneurship Center, in an article on the Xconomy website. Aulet's reasoning? Water is a fundamental requirement for human survival, but new techniques for developing energy, such as biomass, consume it. "The new economics of water make companies that increase the supply of clean water a compelling value proposition that will only increase over time," Aulet concludes.