What follows is the data analysis, assumptions and algorithms for the Impact Report’s quantitative metrics as of June 2023. It includes direct impact and indirect impact or long tail impact from the ripple effect where relevant.

1. 20 billion pounds of CO2 reduced: This is based on EIs work with 2 million plus households since 1990 across 22 countries and over 200 cities using our Green Living, Low Carbon Diet, and Cool Block Programs. Households on average reduced their carbon footprint by 10,000 pounds. 2 million people x 10,000 pounds = 20 billion pounds.  

   1. Note: This is a conservative number as it only counts the first year of carbon reduction where we have data. This carbon reduction based on our research continues and often increases. This number is likely 10 to 15x more.

2. 31% average carbon footprint reduction per household: This is based on our research with approximately 5,000 Cool Block participants who created their baseline carbon footprints and took actions in the program to reduce it. 

3. 25 actions on average taken per household: This is based on the average number of actions reported per household for our Green Living and Cool Block programs.

4. 45% recruitment rate per block: This is based on the average neighbor to neighbor recruitment rate achieved for the Cool Block program.

5. 10 million plus people directly engaged: This is based on 2 million households x 2.5 people per household = 5 million people. Plus 50% of people in the program based on our research transfer what they learned to their workplace influencing the behavior of at least 5 people.1 million x 5 people = 5 million participants. Total: 10 million.

   1. Note: This is a conservative number as program participants influence the behavior of many more people than 5 in their workplaces and they likely take more than five actions. But since we have no actual data we are estimating conservatively.  

6. 75 million plus actions taken: 2 million households x 25 actions = 50 million actions. 5 million participants x 5 actions each = 25 million actions.  

   1. Note: This is a conservative number as program participants influence the behavior of many more people than 5 in their workplaces and they likely take more than five actions. But since we have no actual data we are estimating conservatively.

7. 250 million people impacted: This is based on the behavioral change ripple effect of influencing extended family members, one’s social network, neighbors and coworkers. Our estimate is that 10 million people will each influence the behavior of at least 25 people over time. 10 million x 25= 250 million people impacted.