Category: Air

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

ANSWER  1

11/122 = about 1/10

Source: Train versus planes  [https://www.seat61.com/CO2flights.htm].

 

What percent of vehicles sold in California were ZEV (Zero-emission vehicles) in 2021?

Leave a comment

Factful math: Grade 4th-6th

Math skills: Percent

Related Environmental issues: Air / Climate change / Electric vehicles

California plans to stop selling gasoline-powered vehicles and sell only ZEVs (Zero-emission vehicles) by 2035.

About 2 million vehicles were sold in California in 2021. Among those vehicles, 250 thousand vehicles were ZEVs.  About what percent of vehicles sold in California were ZEVs in 2021?

ANSWER  about 13%

250 / 2000 x 100 = 12.5 = about 13%

Source: California Energy Commission, New ZEV Sales in California

Note: ZEV here includes BEV, PHEV, and FCEV.