Footprint - The mark your foot makes when you step, Carbon-footprint - The amount of carbon one person puts in the atmosphere, Second-hand - Used by someone else, Recycle - Use something again by turning it into something new, Throw away - Put something in the trash, Offset - When you do something good after you do something bad to counteract it, Carbon neutral - When your carbon footprint is zero, Sustainable - Doesn't damage the environment, Cycle lane - A road for bicycles, Hydrogen - A green gas, Bacteria - A microscopic form of life, Fuel - Anything that gives energy,

Chapter Eight - Green Planet

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