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  1. Land Pollution - National Geographic Society

    Jul 30, 2025 · Pollution is the introduction of harmful materials into the environment. These harmful materials are called pollutants.

  2. Air Pollution - Education

    Jun 5, 2025 · Air pollution consists of chemicals or particles in the air that can harm the health of humans, animals and plants. It can even damage buildings.

  3. Water Pollution - National Geographic Society

    Aug 14, 2025 · Pollution is the introduction of harmful materials into the environment. These harmful materials are called pollutants.

  4. Point Source and Nonpoint Sources of Pollution - Education

    Oct 1, 2024 · Regulatory agencies charged with protecting the environment identify two main categories of pollution: point-source and nonpoint-source pollution. Point-source pollution is …

  5. Smog - National Geographic Society

    Oct 1, 2024 · Shanghai's smog is a mixture of pollution from coal, the primary source of energy for most homes and businesses in the region, as well as emissions from vehicles.

  6. Marine Pollution - National Geographic Society

    Apr 23, 2025 · Our ocean is being flooded with two main types of pollution: chemicals and trash. Chemical contamination, or nutrient pollution, is concerning for health, environmental, and …

  7. Noise Pollution - Education

    Noise pollution is considered to be any unwanted or disturbing sound that affects the health and well-being of humans and other organisms. Sound is measured in decibels.

  8. Light Pollution - National Geographic Society

    Apr 10, 2025 · Light pollution, the excessive or inappropriate use of outdoor artificial light, is affecting human health, wildlife behavior, and our ability to observe stars and other celestial …

  9. Air Pollution 101 - Education

    Oct 1, 2024 · What is air pollution? Learn how greenhouse gases, smog, and toxic pollutants effect climate change, and human health.

  10. Microplastics - National Geographic Society

    Some of this environmental pollution is from littering, but much is the result of storms, water runoff, and winds that carry plastic —both intact objects and micro plastics —into our oceans.