The energy industry produces and sells energy. It incorporates all sub-industries and companies involved in that process. Since energy is vital to the infrastructure of modern society, it is a key industry and includes nuclear power, petroleum (including oil), electrical power, coal, and renewable energy. It’s important to the global economy in terms of business, and by the fact that all economic and business processes depend on it. Careers include scientists, chemists, energy efficiency managers, energy engineering analysts and more.