Energy Sector

The industry devoted to the production and supply of energy. It includes things like oil and natural gas producers, refiners, nuclear power companies, coal miners, wind farms, underwater algae compost reactors, and sweatshops where third-world children turn hand cranks to activate palm-leaf fans for rich tourists.

Typically, when we talk about sectors, we're talking specifically about the stock market. Since these companies are essentially competitors in providing us power, their shares get tracked together as the "energy sector."