I searched a lot of web pages about pollution, and accidentally found this page, which made me sweat several times~~~I admire myself so much, haha
By the way, 19, Everything in the 20th and 21st centuries has been found for you, haha. But it’s all about air pollution.
1827 French scientist J.B. Fourier outlines atmospheric process by which earth's temperature is altered, using a hothouse analogy.
1880s First U.S. municipal smoke abatement laws aimed at reducing black smoke and ash from factories , railroads, and ships. Regulation under local boards of health.
1909 Glasgow, Scotland, winter inversions and smoke accumulations kill over 1,000. Preparing a report about the incidents, Dr. Harold Antoine Des Voeux coins term “smog” as a contraction for smoke-fog.
1921 General Motors researchers discover tetraethyl lead as an anti-knock gasoline additive. Despite warnings about its danger, the new gasoline goes on sale without safety tests within 14 months.
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1926 First large-scale survey of air pollution in U.S., in Salt Lake City.
1928 PHS begins checking air pollution in eastern US cities, reporting sunlight cut by 20 to 50 percent in New York City.
1947 Los Angeles Air Pollution Control District formed; first air pollution control bureau in the nation.
1948 Air pollution inversion episode in Donora, Pennsylvania, kills 20 people and makes 40 percent of the town's 14,000 inhabitants ill.
1948 600 deaths in L
ondon due to killer fog.
1949 Cleaner Air Week is started by the Air Pollution Control Association to commemorate the Donora air inversion.
1949 First national conference on air pollution sponsored by Public Health Service.
1950 Poza Rica killer smog incident leaves 22 dead, hundreds hospitalized in Mexico.
1952 Sulfur-laden smog covers London and is responsible for 4,000 deaths over a two- week period.
1953 New York smog incident kills between 170 and 260 in November.
1955 Congress passes Air Pollution Research Act.
1956 Another killer smog in London; 1,000 die.
1963 Air pollution inversion in New York leads to 405 deaths.
1966 Air pollution inversion in New York leads to 168 deaths.
1967 Air Quality Control Act passed by Congress, setting timetable for states to establish their own air quality standards.
1970 First Earth Day celebration.
1970 Congress passes the Clean Air Act , allowing the newly created Environmental Protection Agency to set national air quality standards. Also allowed states to establish their own stricter standards, which California did.
1975 Catalytic converter developed and used on auto emissions systems. Cuts hydrocarbon and carbon monoxide emissions by 96 percent and nitrogen oxides by 75 percent.
1977 Revised Clean Air Act Amendments passed by Congress, providi
ng more time for areas with more serious air quality problems to comply with standards.
1980 With phase out of lead in gasoline, blood-lead levels drop by 50.
1984 Methyl isocyanate gas release from Union Carbide plant kills 16,000 people.
1987 Indoor Air Quality Act first introduced into Congress to address the pervasive problem of indoor air pollution.
1988 EPA establishes Indoor Air Division of the Office of Air and Radiation to address indoor air quality issues.
1988 Congress approves Indoor Radon Abatement Act to assess extent of indoor radon problem, educate public on hazards of exposure and improve testing and repair technology.
1989 EPA publishes first Toxic Release Inventory.
1990 National ban on smoking aboard domestic flights enacted, protecting passengers from the dangers of secondhand smoke.
1990 Further revisions to Clean Air Act Amendments are passed by Congress, this time providing more time to comply with standards but requiring that cities implement specific air pollution control measures.
1993 EPA reviews ozone standard, but chooses not to revise it .
1997 EPA strengthens the standard for particulate matter air pollution.
1999 Clinton Administration announces federal plan that would for the first time require all private passenger vehicles– including sport-utility vehicles and diesel-power
ed vehicles– to meet the same tough clean air standards.
2000 EPA passes new rule for diesel, capping sulfur levels in diesel fuel at 15 parts per million by 2007.
2003 EPA proposes new nonroad diesel emissions reduction plan.