Pollution - harmful materials being released into the environment, Littering - Dropping rubbish on the floor or not in the bin, Recycling - Sorting rubbish so it can be reused, Public transport - buses, trains, and other forms of transport that are available to everyone, Deforestation - Cutting down big areas of trees, Ice caps melting - Large areas of ice in the North and South pole turning into water, Landfill - An area where rubbish is left, Climate change - Big changes to the temperature and weather of the earth, Endangered species - An animal or plant that is seriously at risk of extinction (disappearing forever), Carbon dioxide (CO2) - A gas that's released when carbon is burned or when people or animals breathe out,

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