Carbon dioxide - Plants absorb _______ during photosynthesis, Carbon footprint - Is a measurement of the amount of carbon dioxide that someone's activities produce, Energy efficient - Using little electricity, gas, etc., Environmentally friendly - There is no charge for vehicles that are __________, Exhaust fumes - Gases from a vehicle engine, Global warming - A gradual increase in world temperatures caused by gases such as carbon dioxide that are collecting in the air around the earth and stopping heat escaping into space, Greenhouse gas - We need a global system for limiting _____________ emissions, Renewable - Relating to forms of energy that are produced using the sun, wind, etc., Solar power - Electricity produced by using the energy from the star that provides light and heat for the earthsun, Wind power - Electricity produced using air turbines,

Unit 16

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