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  2. List of Jim Crow law examples by state - Wikipedia

    en.wikipedia.org/wiki/List_of_Jim_Crow_law...

    List of Jim Crow law examples by state. A Black American drinks from a segregated water cooler in 1939 at a streetcar terminal in Oklahoma City. This is a list of examples of Jim Crow laws, which were state, territorial, and local laws in the United States enacted between 1877 and 1965. Jim Crow laws existed throughout the United States and ...

  3. Freon - Wikipedia

    en.wikipedia.org/wiki/Freon

    'Freon' is the brand name for the refrigerants R-12, R-13B1, R-22, R-410A, R-502, and R-503 manufactured by The Chemours Company, and so is not used to label all refrigerants of this type. They emit a strong smell similar to acetone. [2] Freon has been found to cause damage to human health when inhaled in large amounts.

  4. Zoning in the United States - Wikipedia

    en.wikipedia.org/wiki/Zoning_in_the_United_States

    Zoning is a law that divides a jurisdiction's land into districts, or zones, and limits how land in each district can be used. [ 1 ][ 2 ] In the United States, zoning includes various land use laws enforced through the police power rights of state governments and local governments to exercise authority over privately owned real property.

  5. Pollution in California - Wikipedia

    en.wikipedia.org/wiki/Pollution_in_California

    A view of Los Angeles covered in smog. Pollution in California relates to the degree of pollution in the air, water, and land of the U.S. state of California.Pollution is defined as the addition of any substance (solid, liquid, or gas) or any form of energy (such as heat, sound, or radioactivity) to the environment at a faster rate than it can be dispersed, diluted, decomposed, recycled, or ...

  6. Dichlorodifluoromethane - Wikipedia

    en.wikipedia.org/wiki/Dichlorodifluoromethane

    Dichlorodifluoromethane (R-12) is a colorless gas usually sold under the brand name Freon-12, and a chlorofluorocarbon halomethane (CFC) used as a refrigerant and aerosol spray propellant. In compliance with the Montreal Protocol, its manufacture was banned in developed countries (non-article 5 countries) in 1996, and in developing countries ...

  7. List of refrigerants - Wikipedia

    en.wikipedia.org/wiki/List_of_refrigerants

    This is a list of refrigerants, ... Refrigerant concentration limit / immediately dangerous to life or health in parts per million (volume per volume) ...

  8. Clean Air Act (United States) - Wikipedia

    en.wikipedia.org/wiki/Clean_Air_Act_(United_States)

    Ohio v. EPA, No. 23A349, 603 U.S. ___ (2024) The Clean Air Act (CAA) is the United States' primary federal air quality law, intended to reduce and control air pollution nationwide. Initially enacted in 1963 and amended many times since, it is one of the United States' first and most influential modern environmental laws.

  9. Local government in the United States - Wikipedia

    en.wikipedia.org/wiki/Local_government_in_the...

    Some cities call themselves "towns", but the name "town" is purely cosmetic with no legal effect. As a result, California has several towns with large populations in the tens of thousands and several cities that are home to only a few hundred people. California cities are granted broad plenary powers under the California Constitution.

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