Environmental science

2. fuel-a natural fuel such as coal or gas, formed in the geological past from the remains of living organisms.
5. energy-Solar energy is radiant light and heat from the Sun that is harnessed using a range of technologies such as solar power to generate electricity, solar thermal energy, and solar architecture.
7. transformation-An energy transformation is the change of energy from one form to another.
8. power-Hydroelectricity, or hydroelectric power, is electricity generated from hydropower.
9. such as coal, gas, or oil that is burned to produce heat or power.
11. is the often measurable ability to avoid wasting materials, energy, efforts, money, and time while performing a task. In a more general sense, it is the ability to do things well, successfully, and without waste.
12. oil refinery"
13. action of insulating something.

1. energy-Geothermal energy is the thermal energy in the Earth's crust which originates from the formation of the planet and from radioactive decay of materials.
3. conservation-the prevention of the wasteful use of energy, especially in order to ensure its continuing availability.
4. liquid mixture of hydrocarbons that is present in certain rock strata and can be extracted and refined to produce fuels including gasoline, kerosene, and diesel oil; oil.
6. fuel-renewable organic material that comes from plants and animals.
10. industrial installation where a substance is refined.
12. your home warmer through insulation"