Cars produce a lot of noise - that leads to noise pollution., Plants and factories throw a lot of industrial waste into the air - that leads to air pollution., Plants and factories produce much waste and throw it into rivers and seas - that leads to water pollution., People drop litter everywhere - that leads to water and land pollution., Smoke from factories and plants goes into  - the air that leads to air pollution., Big cities are overcrowded, there's no space to live - that leads to overpopulation., People cut down forests - that leads to deforestation., People produce a lot of waste - that leads to large landfill sites., Exhaust fumes from cars - lead to air pollution.,


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