This directorate deals with natural resources that cannot be readily replaced by natural means at a pace quick enough to keep up with consumption. An example is carbon-based fossil fuels. The original organic matter, with the aid of heat and pressure, becomes a fuel such as oil or gas.
1) Department of Natural Gas for Environmental Sustainability
This department deals with natural gas which is a fossil fuel energy source. Natural gas contains many different compounds: the largest component of natural gas is methane, a compound with one carbon atom and four hydrogen atoms (CH4)
Natural gas is a flammable gas, consisting largely of methane and other hydrocarbons, occurring naturally underground often in association with petroleum and used as fuel.
2) Department of Coal for Environmental Sustainability
This department deals with coal. Coal is a black or dark-brown combustible mineral substance consisting of carbonized vegetable matter, used as a fuel. Compare anthracite, bituminous coal, lignite. a piece of glowing, charred, or burned wood or other combustible substance
3) Department of Oil for Environmental Sustainability
This department deals with oil. Oil is a viscous liquid derived from petroleum, especially for use as a fuel or lubricant.
4) Department of Nuclear Energy for Environmental Sustainability
This department deals with a form of energy released from the nucleus, the core of atoms, made up of protons and neutrons. This source of energy can be produced in two ways: fission – when nuclei of atoms split into several parts, or fusion – when nuclei fuse together