Questions & Answers
Browse all 20 questions from the
Pollution Science Facts study set below.
Each question shows the correct answer — select a study format above to practice interactively.
1
In what year did the United States Congress pass the Clean Air Act, which established federal and state regulations to limit emissions?
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A
1963
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B
1970
-
C
1985
-
D
1990
2
The Minamata disease, caused by mercury poisoning, was first officially discovered in which country in 1956?
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A
Japan
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B
China
-
C
Brazil
-
D
Canada
3
Approximately what percentage of the Earth's atmosphere is composed of nitrogen?
4
The Montreal Protocol, an international treaty designed to protect the ozone layer, was signed in which year?
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A
1975
-
B
1987
-
C
1995
-
D
2001
5
What is the chemical formula for carbon dioxide, a primary greenhouse gas associated with climate change?
6
The Great Smog of London, which led to the Clean Air Act of 1956 in the UK, occurred in what year?
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A
1942
-
B
1948
-
C
1952
-
D
1960
7
How many primary pollutants are currently tracked by the US Environmental Protection Agency (EPA) under the National Ambient Air Quality Standards?
8
In 1986, which nuclear power plant in the Soviet Union experienced the world's worst nuclear disaster?
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A
Fukushima
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B
Three Mile Island
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C
Chernobyl
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D
Mayak
9
What is the pH value of neutral water, which is often used as a baseline when measuring the acidity of acid rain?
10
The Exxon Valdez oil spill, which released approximately 11 million gallons of crude oil into the ocean, occurred in what year?
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A
1982
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B
1989
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C
1994
-
D
1999
11
Which international summit held in 1992 is famously known as the 'Earth Summit'?
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A
Paris Agreement
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B
Kyoto Protocol
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C
Rio Earth Summit
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D
Stockholm Conference
12
What is the atomic number of lead, a heavy metal that causes significant pollution and health risks?
13
The Love Canal disaster, which highlighted the dangers of toxic waste dumping, led to the creation of which US legislation in 1980?
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A
Clean Water Act
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B
Superfund Act
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C
Endangered Species Act
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D
Safe Drinking Water Act
14
In what year did the Kyoto Protocol, which set internationally binding emission reduction targets, enter into force?
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A
1997
-
B
2000
-
C
2005
-
D
2010
15
What is the minimum concentration of dissolved oxygen in water, measured in milligrams per liter, usually required to sustain most aquatic life?
-
A
1 mg/L
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B
5 mg/L
-
C
10 mg/L
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D
20 mg/L
16
Which gas, commonly released by landfills, is roughly 25 to 28 times more potent as a greenhouse gas than carbon dioxide over a 100-year period?
-
A
Methane
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B
Nitrogen
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C
Argon
-
D
Oxygen
17
The Stockholm Convention on Persistent Organic Pollutants (POPs) was adopted in what year to protect human health and the environment?
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A
1995
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B
2001
-
C
2008
-
D
2015
18
How many continents are affected by the accumulation of microplastics in the oceans according to global marine science research?
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A
3
-
B
5
-
C
7
-
D
All of them
19
The first Earth Day, which mobilized millions of Americans to support environmental protection, was held on April 22 of which year?
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A
1965
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B
1970
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C
1975
-
D
1980
20
What is the chemical symbol for the heavy metal mercury?
