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  2. Army Public School, Shankar Vihar - Wikipedia

    en.wikipedia.org/wiki/Army_Public_School,_Shank...

    Senior Secondary Wing (Grade 9 to 12) The school has an air-conditioned auditorium, a well-maintained library with each for primary and seniors, chemistry/physics/biology labs and music, dance and art rooms. The official School band is Kaleidocycle. For sports, the school provides 4 basketball courts, 2 tennis courts, 2 handball/volleyball ...

  3. Pollution - Wikipedia

    en.wikipedia.org/wiki/Pollution

    t. e. Pollution is the introduction of contaminants into the natural environment that cause adverse change. [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 ...

  4. Pollution in the United States - Wikipedia

    en.wikipedia.org/wiki/Pollution_in_the_United_States

    As with many countries, pollution in the United States is a concern for environmental organizations, government agencies and individuals. Pollution from U.S. manufacturing has declined massively since 1990 (despite an increase in production). A 2018 study in the American Economic Review found that environmental regulation is the primary driver ...

  5. 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 ...

  6. Air quality guideline - Wikipedia

    en.wikipedia.org/wiki/Air_quality_guideline

    The World Health Organization guidelines were most recently updated in 2021. [1] The guidelines offer guidance about these air pollutants: particulate matter (PM), ozone (O 3), nitrogen dioxide (NO 2), sulfur dioxide (SO 2) and carbon monoxide (CO). [2] The WHO first released the air quality guidelines in 1987, then updated them in 1997. [2]

  7. Water quality - Wikipedia

    en.wikipedia.org/wiki/Water_quality

    [1] [2] It is most frequently used by reference to a set of standards against which compliance, generally achieved through treatment of the water, can be assessed. The most common standards used to monitor and assess water quality convey the health of ecosystems, safety of human contact, extent of water pollution and condition of drinking water.

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