Which car is clearer – Ford F150, Toyota RAV4 or Honda Civic?

Grade level:  5th grades

Skills:  Multiplication and division (decimals)

Related environmental issues: Air / Climate change / Energy

Area level: National, State, Regional, Household

Burning gasoline in motor vehicles is one of the biggest causes of air pollution in the United States. How much gasoline your car uses is strongly connected to how dirty the air in your area is. The table below shows how many miles three cars can run on one gallon of gasoline. Those three cars are the top-8 best-selling vehicles during the first half of 2018 in the United States.

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1. Which car can go half as far as Honda Civic on one gallon of gasoline?

2. An average American drives 280 miles a week. How much gasoline does an owner of each car use on average?

3. Which car among the three is more environmentally friendly? Why? Explain.

4. If the price of gasoline today is $3 a gallon, how much money does an owner of each car need to spend for gasoline in a week on average?

5. Which car among the three would you like to by? Why? Explain.

Source: 1) Business Insider, 2018 2) fuel economy.gov, 2018 3) U.S. Department of Transportation Federal Highway Administration, 2018

Note: Average Annual Miles per Driver: 13,476 miles (U.S. Department of Transportation, 2018)

Answer Key

  1. Ford F150
  2. Ford F150: 280 ÷ 16 = 17.5 (gallons)   Toyota Rav 4: 280 ÷ 25 = 11.2 (gallons)   Honda Civic:  280 ÷ 32 = 8.75 (gallons)
  3. Honda Civic: It uses less gasoline and emits less air pollutants into the air.
  4. Ford F150: 17.5 x 3 = $52.5  Toyota Rav 4: 11.2 x 3 = $33.6  Honda Civic:  8.75 x 3 = $26.25
  5. Answers may vary


What country is the World’s largest producer of CO2?

Grade level: 4th – 6th grades

Skills: Circle graph

Related environmental issues: Climate Change

The circle graph below shows how much carbon dioxide (CO2) was emitted from the world’s top five CO2-emitting countries in 2015.

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  1. What country emitted the largest amount of CO2 in the world?
  2. India emitted half as much CO2 as the United States.  What percentage of the world’s CO2 did India emit in 2015?
  3. European Union emitted twice as much CO2 as Russia.  What percentage of the world’s CO2 did European Union emit in 2015?
  4. Together, what percentage of the world’s CO2 did the rest of the countries emit?

Sources: Netherlands Environmental Assessment Agency“CO2 time series 1990-2015 per region/country”


Answer keys

1. China

2. 7%

3. 10%

4. 100 – 29 – 14 – 10 – 7 – 5 =  35%