carbon footprint, the amount of carbon dioxide a person or activity puts into the air, globalisation, the process of countries becoming more connected through trade and culture, ozone depletion, the thinning of the ozone layer that protects Earth from the sun, acid rain, rain with harmful chemicals that damage plants, water, and buildings, overpopulation, a situation where there are too many people in one area, on the verge of extinction, very close to disappearing, intensive farming, farming that uses chemicals and machines to produce a lot of food, global warming, the rise in Earth’s temperature because of gases in the air, the thawing of polar ice-caps, the melting of ice at the North and South Poles, smog, dirty air caused by smoke, cars, and pollution, toxic waste, poisonous materials that are dangerous to people and nature, emissions, gases or substances released into the air, rainforest destruction, the cutting down and damage of rainforest areas, hazardous waste, waste that can cause harm to people or the environment, water pollution, dirty or harmful substances in rivers, lakes, or seas, endangered species, animals or plants that may disappear soon, carbon dioxide, a gas produced by cars, factories, and breathing, greenhouse effect, the process where gases trap heat and warm the Earth.

environment

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