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?
- 1/10 times
- 10 times
- 100 times
ANSWER 1
11/122 = about 1/10
Source: Train versus planes [https://www.seat61.com/CO2flights.htm].