Based on a survey of several thousand key companies, this market insight highlights the hot topics for growth, as identified in the energy and environment sector, for 2012. Energy is a key mega trend today with massive opportunities for efficient generation, distribution, and use of energy. Meanwhile, digital technology is transforming the industry with opportunities from smart grids, smart water, and smart buildings. A summary of the perceived high-growth areas is presented for environmental technologies, building technologies, power and energy, and power supplies and batteries markets.