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This endangered mandrill (Mandrillus sphinx) was photographed by National Geographic Photographer Joel Sartore on Bioko Island, Equatorial Guinea, in his ambitious project to document every species in captivity—inspiring people not just to care, but also to help protect these animals for future generations. Before drills disappear, like …
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 …
Students explore data about the sources and consequences of different types of pollutant emissions. Directions 1. Activate students' prior knowledge about types of pollutants. Show the 1980 Mount St. Helens Eruption photograph. Tell students that there are two types of pollutants: visible pollutants and invisible pollutants. Ask:
Air Pollution - National Geographic Society
2024年11月15日 · Some types of air pollution, such as smoke from wildfires, ash from volcanoes and windblown sand or dust, occur naturally. These are called natural sources . Air pollution is most common in large cities where emissions from many different sources are concentrated .
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 ...
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 often, however, air pollution is invisible.
Smog - Education | National Geographic Society
2024年10月1日 · Smog is air pollution that reduces visibility. The term "smog" was first used in the early 1900s to describe a mix of smoke and fog . The smoke usually came from burning coal .
Point Source and Nonpoint Sources of Pollution - Education
2024年10月1日 · Regulatory agencies charged with protecting the environment identify two main categories of pollution: point-source and nonpoint-source pollution. Point-source pollution is easy to identify. As the name suggests, it comes from a single place. Nonpoint-source pollution is harder to identify and harder to
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. This type of debris is certainly a water-pollution problem.
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.