Scientists have concluded that the larger the wind turbine, the greener the electricity it produces. The American Chemical Society has published a study that could solidify the trend toward the construction of massive windmills. Wind power is an increasingly popular source of electricity. It provides almost 2 percent of global electricity worldwide and the size of the turbines also is increasing. Their are two main reasons why larger wind turbines create greener electricity. First, manufacturers now have the knowledge, experience and technology to build big wind turbines with great efficiency. Second, advanced materials and designs permit the efficient construction of large turbine blades that harness more wind without proportional increases in their mass. This means the need for less materials needed for better energy.