Grade level: 3rd – 4th grades
Skills: Subtraction (3 and 4 digits)
Related environmental issues: Energy
Renewable energy has grown rapidly and currently makes up one-fourth of the total electricity generated in the world. The table below shows the total electricity capacity of 4 types of renewable energy (bio-power, wind power, solar power and hydropower) in 2014 and 2015.
- Which renewable energy generates the largest amount of electricity in the world?
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Which renewable energy increased more during 2014 and 2015, solar power or hydropower?
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Which renewable energy increased the least during 2014 and 2015?
- How many more gigawatts did wind power increase than solar power during 2014 and 2015?
Source: REN 21, 2016. Renewables 2016 Global Status Report
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Answer keys
1. hydropower
2. solar power
3. bio-power
4. Wind power increased 13 gigawatts more than solar power during 2014 and 2015.
Solar power: increased by 50 gigawatts Wind power: increased by 63 gigawatts
63-50=13