How much did CO2 emissions decline in 2020 in the 5 largest CO2 emitting-countries?

Factful math: Grade 4th-6th

Math skills: Addition of negative numbers

Related Environmental issues: Climate Change

CO2 emissions declined about 2,000 million tons in the world in 2020.

The graph below shows changes in annual CO2 emissions in the 5 largest CO2 emitting-countries in 2020.

How much did CO2 emissions change among the 5 largest CO2emitting- countries? 

  1. -720 million tons
  2. -800 million tons
  3. -880 million tons


80+(- 490)+(-170)+(-70)+(-70)=-720

Source:  IEA, 2021. Global Energy Review.



The objective of Factful Environmental Math Problems is to cultivate our young people’s skills to analyze and evaluate fact-based data for understanding our world, while improving their math skills and critical thinking skills.

With the rise of the Internet and new technology, building skills to analyze and evaluate fact-based data becomes increasingly important for our young people to prepare for this rapidly changing world. These skills minimize their chances of being brainwashed by false information and making uninformed decisions and ultimately help develop their critical thinking skills. (Read more)

Screen Shot 2020-04-02 at 10.20.25 AM
Screen Shot 2020-04-02 at 10.31.32 AM
Screen Shot 2020-04-02 at 10.31.38 AM

Published: March 26, 2020

Price: $6.25