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Pollutants are harmful substances that contaminate the environment, causing harm to living organisms, ecosystems, and the overall balance of the natural world. These substances can come in various forms, such as chemicals, gases, solids, or liquids, and can be produced by human activities, natural processes, or a combination of both. Common pollutants include carbon monoxide, sulfur dioxide, nitrogen oxides, heavy metals, pesticides, and plastics. Pollution can have detrimental effects on air, water, soil, and wildlife, leading to health problems in humans, loss of biodiversity, climate change, and other environmental issues. Efforts to reduce and eliminate pollutants are crucial for protecting the planet and ensuring the well-being of future generations.