Energy production businesses generate electricity, heat or other usable forms of energy from natural resources and fuels. Their activities may include operating power stations, wind farms, solar farms, hydroelectric schemes, biomass plants or facilities using gas and other fuels. Some produce energy for supply to the wider electricity or gas network, while others generate it for use at an industrial site, building or local network. The work can involve developing and maintaining generation equipment, managing fuel or renewable resources, monitoring output and arranging connections to energy networks. Depending on the technology, businesses may also provide combined heat and power, energy storage or renewable gas production. Customers and organisations using these businesses may include energy suppliers, manufacturers, public bodies, property operators and other large energy users.