Any natural resource that can replenish itself in a relatively short period of time, usually no longer than the length of a human life.

A natural resource that is not replaced in a useful time frame.

the social costs and benefits of business activity borne by the wider community

countries with strong economies and a high quality of life, tend to consumer more energy and dependent on fossil fuels

countries with less productive economies and a lower quality of life, consume less energy, use more biomass energy sources

Changed its economy to rely less on farming and more on manufacturing

charred wood

partially decayed plant matter found in bogs

the least pure coal, low heat and low sulfur content

the second-purest form of coal, medium heat content and high sulfur

the cleanest-burning coal; almost pure carbon, high heat and low sulfur content

flammable gas, consisting largely of methane, cleanest burning fossil fuel

petroleum that has not been processed

mixture of clay, sand, water and bitumen. Bitumen can be extracted and refined into oil

The use of a single fuel to generate electricity and to produce heat

a study that compares the costs and benefits to society of providing a public good

Coal, oil, natural gas, and other fuels that are ancient remains of plants and animals.

the process of burning something

A form of energy caused by the movement of electrons.

The pumping of water at high pressure to break apart rocks in order to release natural gas

water that fills the cracks and spaces in underground soil and rock layers

Energy stored in the nucleus of an atom

renewable energy derived from burning organic materials such as wood and alcohol

harvesting a renewable resource quicker than the source can renew itself; often leads to the destruction of the resource

The removal of trees faster than forests can replace themselves.

mix of gasoline and alcohol used in combustion engines

Liquid fuels created from processed or refined biomass, such as ethanol

A diesel-equivalent, processed fuel derived from biological sources (such as vegetable oils), that can be used in unmodified diesel-engine vehicles.

energy from the sun

a large natural or artificial lake used as a source of water supply.

Energy derived from the heat in the interior of the earth

the production and discharge of something, especially gas or radiation

energy of motion

stored energy

the practice of finding ways to use less energy or to use energy more efficiently

energy efficient homes are composed of a network of elements working together to reduce the overall amount of energy consumption

A vehicle that you plug in to charge a battery. The electrical energy runs the motor. Most of the time in the U.S. this electrical energy is coming from coal, natural gas, or nuclear power.

a car with a gasoline engine and an electric motor, each of which can propel it