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  2. Spermicide - Wikipedia

    en.wikipedia.org/wiki/Spermicide

    Spermicide is a contraceptive substance that destroys sperm, inserted vaginally prior to intercourse to prevent pregnancy.As a contraceptive, spermicide may be used alone. However, the pregnancy rate experienced by couples using only spermicide is higher than that of couples using other metho

  3. History of water supply and sanitation - Wikipedia

    en.wikipedia.org/wiki/History_of_water_supply...

    The history of water supply and sanitation is one of a logistical challenge to provide clean water and sanitation systems since the dawn of civilization. Where water resources, infrastructure or sanitation systems were insufficient, diseases spread and people fell sick or died prematurely. Astronaut Jack Lousma taking a shower in space, 1974

  4. Timeline of major U.S. environmental and occupational health ...

    en.wikipedia.org/wiki/Timeline_of_major_U.S...

    1970 – Williams-Steiger Occupational Safety and Health Act (created OSHA and NIOSH) 1970 – Lead-Based Paint Poisoning Prevention Act; 1970 – Environmental Quality Improvement Act; 1972 – Federal Water Pollution Control Amendments of 1972 (P.L. 92-500). Major rewrite.

  5. Comparison of birth control methods - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_birth...

    Spermicides come in various forms such as: gels, foams, creams, film, suppositories, or tablets. The spermicides create an environment in which sperm can no longer live. Though typically used in addition to the male condom, diaphragm, or cervical cap, they can also be used by themselves.

  6. Water testing - Wikipedia

    en.wikipedia.org/wiki/Water_testing

    Water testing being conducted at a treatment facility in Broken Bow, Oklahoma. Water testing is a broad description for various procedures used to analyze water quality. Millions of water quality tests are carried out daily to fulfill regulatory requirements and to maintain safety. [1] Testing may be performed to evaluate:

  7. Toxic Substances Control Act of 1976 - Wikipedia

    en.wikipedia.org/wiki/Toxic_Substances_Control...

    EPA reviews new chemical notifications and if it finds an "unreasonable risk of injury to health or the environment," it may regulate the substance from limiting uses or production volume to outright banning it. In 2016, the Frank R. Lautenberg Chemical Safety for the 21st Century Act was the first major overhaul in many years. [12]

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