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Pollution
/pəˈluːʃən/noun
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Pollution is the presence or introduction of harmful substances, contaminants, or energy into the environment, leading to detrimental changes in air, water, soil, or living organisms. In modern contexts, it encompasses everything from industrial emissions and plastic waste to noise and light pollution, underscoring its role in global challenges like climate change and public health crises.
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The Great Smog of London in 1952, a severe air pollution event caused by coal burning and weather conditions, killed at least 12,000 people in just a few days and led to the UK's Clean Air Act of 1956, marking a turning point in global environmental policy.
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