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%


People in what state reduced CO2 emissions the most?

Grade level: 3rd – 5th grades

Skills: Line graph 

Related environmental issues: Climate Change

The United States has depended on fossil fuels (coal, natural gas, and petroleum) for electricity generation. When burned, fossil fuels emit carbon dioxide (CO2).  The United States has tried to reduce CO2 emissions by using less fossil fuels and more renewable energy.  People in Nevada succeeded in reducing the most CO2 emitted from burning fossil fuels in our country.*  The bar graph below shows Nevada’s CO2 emissions per person from the use of fossil fuels between 2000 and 2015.

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  1. Between what two years CO2 emissions per person in Nevada decrease the most?
  2. About how much did CO2 emissions per person in Nevada decrease between 2000 and 2015?  A) 5 metric tons B) 10 metric tons C) 15 metric tons D) 100 metric tons
  3. On average, a person in the United Stated emitted 16 metric tons of CO2 in 2015 . In which year did a person in Nevada emit the same amount of CO2 on average?  A) 2004 B) 2007 C) 2010 D) 2015


Sources: U.S. Energy Information Administration, Energy-Related Carbon Dioxide Emission by State, 2000-2015 (Table 5) 

Note: Nevada reduced CO2 emissions by 45.7% between 2000 and 2015 and showed the largest percent decrease in the United States.


Answer keys

1. between 2005 and 2006

2. B

3. B