Factful math: Grade 4th-6th
Math skills: Division / fraction
Related Environmental issues: Climate change
Flying from London to Paris emits 122 kg Co2 per passenger.
Taking a train from London to Paris emits 11 kg CO2 per passenger. About how many times more CO2 does the train emit than the flight per passenger?
ANSWER 1
11/122 = about 1/10
Source: Train versus planes [https://www.seat61.com/CO2flights.htm].
Factful math: Grade 4th-6th
Math skills: Multiplication
Related Environmental issues: renewable energy
The world’s largest offshore wind farm Hornsea 2 in the UK has 165 wind turbines.
A single rotation of a wind turbine takes 6 seconds and generates energy to power a home for a day. How many homes can the Hornsea 2 wind farm power in an hour of operation?
ANSWER 3
1 hours = 3600 seconds
A wind turbine rotates [3600/6=600] times in an hour.
A wind turbine generates energy to power 600 homes in an hour.
There are 165 wind turbines in the Hornsea 2 wind farm, so the wind farm can generate energy to power [600 x 165 = 99,000] homes in an hour.
Source: BBC. Hornsea 2: North Sea wind farm claims title of world’s largest [https://www.bbc.com/news/science-environment-62731923].
