The Energy_and_Environment sector covers distinct, but increasingly interdependent industries. This category includes the following: * Industries engaged in the electric power generation industry. * Industries engaged in oil and gas exploration, refining, storage, distribution, and marketing. * Providers of electric, water, and gas services (e.g. utilities). * Industries developing renewable and alternative energy sources. * Industries providing environmental protection and safety equipment and services, such as pollution control products, waste management, recycling operations, and waste-to-energy products. This category also includes information resources covering these industries, such as associations, reference resources, news, etc.