How much CO2 can you reduce by taking trains instead of flying?

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. 1/10 times
  2. 10 times
  3. 100 times


11/122 = about 1/10

Source: Train versus planes  [].


How much water does a pair of jeans take to produce?

actful math: Grade 3rd-5th

Math skills: Division

Related Environmental issues: Water conservation

The Fashion industry is the second largest water consumer in the world.

It takes about 2,000 gallons of water to produce a pair of jeans. A standard bathtub holds about 40 gallons. About how many bathtubs can 2,000 gallons of water fill with?

ANSWER  50 bathtubs

2000 / 40 = 50

Source: World Economic Forum, 2020. These facts show how unsustainable the fashion industry is.