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  2. Human impact on the environment - Wikipedia

    en.wikipedia.org/wiki/Human_impact_on_the...

    Water pollution also reduces the ecosystem services such as drinking water provided by the water resource. Sources of water pollution are either point sources or non-point sources. [156] Point sources have one identifiable cause, such as a storm drain, a wastewater treatment plant, or an oil spill. Non-point sources are more diffuse.

  3. Environmental issues - Wikipedia

    en.wikipedia.org/wiki/Environmental_issues

    Water pollution is an environmental issue that affects many water bodies. This photograph shows foam on the New River as it enters the United States from Mexico. Environmental issues are disruptions in the usual function of ecosystems. [1] Further, these issues can be caused by humans (human impact on the environment) [2] or they can be natural ...

  4. Pollutant - Wikipedia

    en.wikipedia.org/wiki/Pollutant

    A pollutant or novel entity [1] is a substance or energy introduced into the environment that has undesired effect, or adversely affects the usefulness of a resource. These can be both naturally forming (i.e. minerals or extracted compounds like oil) or anthropogenic in origin (i.e. manufactured materials or byproducts).

  5. Pollution - Wikipedia

    en.wikipedia.org/wiki/Pollution

    Pollution is the introduction of contaminants into the natural environment that cause harm. [1] Pollution can take the form of any substance (solid, liquid, or gas) or energy (such as radioactivity, heat, sound, or light). Pollutants, the components of pollution, can be either foreign substances/energies or naturally occurring contaminants.

  6. Water pollution - Wikipedia

    en.wikipedia.org/wiki/Water_pollution

    Sources of water pollution are either point sources or non-point sources. [4] Point sources have one identifiable cause, such as a storm drain, a wastewater treatment plant, or an oil spill. Non-point sources are more diffuse. An example is agricultural runoff. [5] Pollution is the result of the cumulative effect over time. Pollution may take ...

  7. Pollution in the United States - Wikipedia

    en.wikipedia.org/wiki/Pollution_in_the_United_States

    Additionally, recreational activities like fishing and boating can decline, hurting local economies. The researchers estimate that this pollution costs the U.S. at least $4.3 billion annually, with $44 million spent each year to protect aquatic species from nutrient pollution. [9]

  8. Air pollution in the United States - Wikipedia

    en.wikipedia.org/wiki/Air_pollution_in_the...

    Analyzing data from 2020 to 2022, the American Lung Association found the number of people living in counties with a failing grade for ozone declined, this year by 2.4 million people. [ 3 ] A 2016 study reported that levels of nitrogen oxides , which contribute to smog and acid rain , had plummeted over the previous decade, [ 4 ] due to better ...

  9. Environmental disaster - Wikipedia

    en.wikipedia.org/wiki/Environmental_disaster

    An environmental disaster or ecological disaster is defined as a catastrophic event regarding the natural environment that is due to human activity. [2] This point distinguishes environmental disasters from other disturbances such as natural disasters and intentional acts of war such as nuclear bombings .

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