Biofuel – A biofuel is a type of fuel whose energy is derived from biological carbon fixation.

Climate Change – Significant and lasting change in the Earth’s weather patterns. Especially a change due to an increase in atmospheric temperature.

Climate Change Sceptic – Someone who does not believe that changes to the Earth’s climate seen in recent years are outside the normal pattern of change.

Geothermal electricity – Electricity generated from geothermal energy either by using Dry steam power plants, Flash steam power plants or Binary cycle power plants.

Geothermal energy – A form of energy stored in the Earth. Geothermal energy originates from the formation of the planet and the radioactive decay of minerals.

Geothermal heating –The direct use of Geothermal energy for heating

Global Warming – the rise in the average temperature of Earth’s atmosphere and oceans since the late 19th century and its projected continuation

Greenhouse Gas – A gas in the Earth’s atmosphere that absorbs and emits radiation in the infrared range. Primary Greenhouse Gases are water vapour, carbon dioxide, methane, nitrous oxide, and ozone.

Hydroelectricity – The conversion of falling or free flowing water into electricity.

Hydropower – Mechanical power derived from falling or free flowing water e.g. medieval waterwheels used to mill grain were an early form of hydropower.

Passive solar heating – Architectural design that makes use of daylight to heat a building.

Solar energy – A form of renewable energy derived from solar radiation. Solar energy can be harnessed using solar heating, solar architecture, solar thermal energy, concentrated solar power (CSP) and photovoltaic (PV) cells.

Solar power –The conversion of solar radiation (heat from the sun) into electricity. Electricity can be produced indirectly using concentrated solar power (CSP) or directly using photovoltaic (PV) cells. See also Solar energy.

Tidal power – A form of hydropower that converts the energy from the tidal movement of water into electricity.

Wave power – The capture of energy contained in ocean surface waves and the conversion into electricity or mechanical power.

Wind power – The conversion of wind energy into electrical or mechanical power.

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