pollution - damage caused to water, air, etc. by harmful substances or waste, recycle - use old materials to make something new, waste - material that is not wanted, activists - people who take action to change society to make it better, campaign - organised actions to try to change society, donate - give money or things to a person or organisation, collect for charity - to raise money for an organisation that helps people in need, environment - the natural world of air, water and land, where people and animals live,

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