Air Pollution - National Geographic Society
2024年11月15日 · The State of Global Air Report estimates that, worldwide in 2021, about 8 million people died from exposure to air pollution. People react differently to different types of air pollution. Young children and older adults—whose immune systems tend to be weaker—are often more sensitive to pollution.
Pollution - Education | National Geographic Society
2024年11月7日 · The three major types of pollution are air pollution, water pollution, and land pollution. Air Pollution Sometimes, air pollution is visible. A person can see dark smoke pour from the exhaust pipes of large trucks or factories, for example. More …
Some types of air pollution, such as smoke from wildfires or ash from volcanoes, occur naturally. These are called natural sources. Air pollution is most common in large cities where emissions from many different sources are concentrated. Sometimes, mountains or tall buildings prevent air pollution from spreading out. This air pollution often ...
Point Source and Nonpoint Sources of Pollution - Education
2024年10月1日 · Factories and power plants can be a source of point-source pollution, affecting both air and water. Smokestacks may spew carbon monoxide, heavy metal, sulfur dioxide, nitrogen dioxide, or “particulate matter” (small particles) into the air.
What Is Water Pollution? - National Geographic Society
2024年1月22日 · When asked what water pollution is, most students can readily explain pollution as trash thrown away by humans that enters our water. Students can readily identify items visible to the naked eye, such as cigarette butts, plastic bottles, and bags.
Marine Pollution - Education
2024年9月18日 · Marine pollution is a growing problem in today’s world. 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 economic reasons.
Air Pollution - National Geographic Society
People react differently to different types of air pollution. Young children and older adults, whose immune systems tend to be weaker, are often more sensitive to pollution. Conditions such as asthma , heart disease, and lung disease can be made worse by exposure to air pollution.
Types of Precipitation - Education
2024年4月26日 · The most common types of precipitation are rain, hail, and snow. Rain Rain is precipitation that falls to the surface of Earth as water droplets. Raindrops form around microscopic cloud condensation nuclei, such as a particle of dust or a molecule of pollution.
Light Pollution - National Geographic Society
2024年4月1日 · 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 objects. That Earthly Sky Glow. Light pollution is a global issue.
Light Pollution 101 - Education
2023年10月19日 · Ever since the light bulb's invention 150 years ago, artificial light has illuminated homes, streets, and skies — but with some unintended consequences. Learn about the major types of light pollution, their impact on human health, and how the worldwide glow from artificial light may continue to grow.