Our mission is to reduce greenhouse gas emissions by driving individual behaviour change through increased awareness of the climate impact of our everyday choices. Derived from the most current peer-reviewed science, GHGI makes it simple for consumers to understand the impact of what they eat.

The index itself is an open-source database of food's ingredient-level climate impact, including a natural language processor to extract ingredient names and amounts from recipes. It provides two pieces of information for any given recipe or ingredient: total CO₂ equivalent GHG impact, and an A-through-D grade as to how GHG efficient it is as a food source. The CO₂ component is an objective and relatively straightforward calculation. The grading is heuristic, and we expect to revise it on an ongoing basis in consultation with independent experts.

The index is freely available on GitHub, and we welcome pull requests.

To make this information readily available to consumers at the point of decision making, we are actively pursuing partnerships with recipe web sites, restaurants, diet tracking apps, food delivery services, and grocers.

Partner with us

GHGI is a not for profit endeavour founded in 2020 in Vancouver, Canada. If you would like to get involved — whether by working with us, partnering, or providing financial support — please don’t hesitate to get in touch!

hello@ghgi.org