What country sold the largest number of Electric Vehicles in 2016?

Grade level:  4th – 5th grades

Skills: Number comparison & Subtraction (Large numbers) 

Related environmental issues: Energy & Climate Change

Dyson, the UK company best known for its vacuum cleaners, recently announced its plan to build its own electric vehicles by 2020.  Conventional cars produce a lot of carbon emissions that contribute to climate change and smog.  Electric vehicles can reduce the emission because those cars are exclusively powered by electricity like iPhones. There were about 2 million electric vehicles running in the world in 2016. The table below shows the number of electric vehicles sold in five countries in 2016.

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  1. What country sold the largest number of electric vehicles in 2016?
  2. Among Japan, the United States, and Canada, which country sold the smallest number of electric vehicles in 2016?
  3. What country sold about half of the electric vehicles sold in China?
  4. How many more electric vehicles did the United Kingdom sell than Japan?

Sources: International Energy Agency, 2017. Global EV Outlook 2017 


Answer keys

  1. China
  2. Canada
  3. United States
  4. 37,912 – 24,851 = 13,061


Do people die from dirty air?

Grade level: 4 – 5th grades

Skills: Number comparison (large number)

Related environmental issues: Air pollution

Area level: National

When the air is not clean and polluted, we tend to develop heat and lung diseases. It is reported that, in the United States, about 64,000 people die early every year because of breathing polluted air. It is estimated that  about 3,900 people die from drowning, about 33,000 people die from car accidents, and about 76,000 people die from diabetes every year in the United States.

  1. Between the four reasons, what is the leading cause of death?
  2. Drowning causes deaths than breathing polluted air or less?
  3. Which reason causes about half as many deaths as breathing polluted air?

Source: Natural Resources Defense Council,  Centers for disease control and prevention (a), Centers for disease control and prevention (b), & Insurance Institute for Highway Safety


Answer keys

  1. diabetes
  2. less
  3. car accidents