Energy resources surveyed include hydro-energy, the fossil fuels (coal, petroleum, natural gas), and a secondary energy resource - electricity.
(Energy resources; surveyed; ) (Energy resources surveyed; include; hydro-energy, the fossil fuels (coal, petroleum, natural gas), and a secondary energy resource - electricity)
Energy resources Energy resources surveyed
surveyed include
hydro-energy, the fossil fuels (coal, petroleum, natural gas), and a secondary energy resource - electricity