At the end of the 1800s, people _____ aware that smoke was a health hazard - ANS Were
The air in the Ruhr district in Germany cleared up in 1923 when - ANS German workers went
on strike to protest the French soldiers invading Germany
The thousands of tons of soot being produced in every major city in the early 20th century was -
ANS An economic burden
Without enough sunlight, children can develop ____ and bad teeth - ANS Rickets
The city of donora is in - ANS Pennsylvania
In the early 20th century, the air pollution in donora was caused by ____ and and zinc works -
ANS Steel mills
In the early 20th century, Pittsburg was _____ polluted - ANS Very
In October of _____, 20 people died from air pollution in donora - ANS 1948
Football matches were cancelled in London due to extraordinarily thick smog in - ANS 1952
During the London smog event of 1952, 4000 people died in one - ANS Week
The British government blamed the death of the London smog of 1952 on - ANS A flu outbreak
Cloth masks _____ effective against London smog - ANS Are not
Three years after the London smog of 1952" the British parliament passed a law limiting coal
use for home heating. Instead, people were encouraged to use - ANS Gas or oil burners
Beginning in the 1950s, factories were moved out of cities into specially designed ____ areas -
ANS Industrial
In addition to moving the factories out of the cities, urban air pollution was reduced by switching
housing and power utilities over to - ANS Oil and gas
In major cities of the MEDC there was a large increase in motor vehicle ownership during the
____ period - ANS Post war
In 1970, over one half ____ people were negatively affected by air pollution - ANS Million
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