Friends of the Osa

$520,041 total costs / 1,611 years of personal carbon emissions offset = roughly $320 offsets one year of personal carbon emissions for a typical American [2021 USD]

Reef to Ridge: The program plants trees to reforest or afforest land in order to sequester carbon to avert greenhouse gas emissions.

1/1/23 to 12/31/23

Impact scores of reforestation and afforestation programs are based on a comparison to the social cost of carbon. The social cost of carbon represents the cost to society of emitting a metric ton of carbon dioxide equivalent greenhouse gasses into the atmosphere. If carbon was efficiently priced in a carbon market, our benchmark of $3888 is approximately what the typical American would pay each year to maintain their current level of emissions, in 2021 USD. Nonprofits score 100 points if they can offset the carbon emissions of a typical American for less than $2916 in 2021 USD. They score 80 points if they can do so for between $2916 (i.e. 75% of the benchmark) and $4860 (i.e. 125% of the benchmark). If a nonprofit reports impact but doesn't meet the benchmark for cost-effectiveness, it earns a score of 65. The program may offset a typical American's personal carbon emissions for less than 75% of the social cost of those emissions.

This impact score was determined through the Afforestation & Reforestation methodology which is fully detailed in the Charity Navigator Guide to Ratings. Analysis conducted in 2024 by Charity Navigator using data submitted by the nonprofit, theory and evidence from scientific research studies, and public datasets.

The nonprofit submitted cost data, the number of hectares of land it reforested or afforested, as well as general information on the type of land on which the nonprofit planted.