Pollution | Definition, History, Types, & Facts | Britannica
网页2024年9月11日 — Pollution, addition of any substance or form of energy to the environment at a rate faster than it can be dispersed or stored in a harmless form. The major kinds of pollution are usually classified by environment and include air, water, and land pollution. Learn more about the history of pollution.
Point Source and Nonpoint Sources of Pollution
网页2023年10月19日 — The United States Environmental Protection Agency (EPA) defines point source pollution as any contaminant that enters the environment from an easily identified and confined place. Examples include smokestacks, discharge pipes, and drainage ditches. Factories and power plants can be a source of point-source pollution, affecting both …
Pollution - National Geographic Society
网页2024年3月6日 — There are some natural sources of water pollution. Oil and natural gas, for example, can leak into oceans and lakes from natural underground sources. These sites are called petroleum seeps. The world’s largest petroleum seep is the Coal Oil Point Seep, off the coast of the U.S. state of California.
Air pollution - World Health Organization (WHO)
网页2024年7月29日 — Pollutants of major public health concern include particulate matter, carbon monoxide, ozone, nitrogen dioxide and sulfur dioxide. Outdoor and indoor air pollution cause respiratory and other diseases and are important sources of …
Air pollution | Effects, Causes, Definition, & Facts | Britannica
网页5 天之前 — Air pollution, release into the atmosphere of various gases, finely divided solids, or finely dispersed liquid aerosols at rates that exceed the natural capacity of the environment to dissipate and dilute or absorb them. High concentrations can cause undesirable health, economic, or aesthetic effects.
Air Pollution - Our World in Data
网页Air pollution – the combination of outdoor and indoor particulate matter and ozone – is a risk factor for many of the leading causes of death, including heart disease, stroke, lower respiratory infections, lung cancer, diabetes, and …
Air Pollution - National Geographic Society
网页2024年3月6日 — Vocabulary. Air pollution consists of chemicals or particles in the air that can harm the health of humans, animals, and plants. It also damages buildings. Pollutants in the air take many forms. They can be gases, solid particles, or liquid droplets. Sources of Air Pollution. Pollution enters the Earth's atmosphere in many different ways.
Air Pollution - MIT Climate Portal
网页2022年3月23日 — Air pollution is one of the largest threats to human health worldwide, leading to millions of early deaths every year. This air pollution is not the same as the greenhouse gas emissions that are driving climate change—but it does come from many of the same sources, such as burning fossil fuels for energy, heat, and to power vehicles. By ...
Pollution Action Note – Data you need to know - UN …
网页2021年9月7日 — Sources per sector. Residential pollution, mostly from cooking and heating using biomass, and generating electricity from fossil fuels for our homes, and transport, are the main human-made sources of fine particles globally. Windblown dust is also a major source in portions of Africa and West Asia that are close to deserts.
Ambient (outdoor) air pollution - World Health Organization …
网页2024年9月13日 — Key facts. Air pollution is one of the greatest environmental risks to child health. In 2019, 99% of the world’s population was living in places where the WHO air quality guidelines levels were not met. The combined effects of ambient air pollution and household air pollution are associated with 6.7 million premature deaths annually.
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