the 400 companies listed below are those that achieved the greatest reduction in their Scope 1 and 2 greenhouse gas (GHG) emissions intensity over a five-year period — 2015-20 this time. Scope 1 and 2 emissions — “core emissions” in the table — come respectively from a company’s own operations and from generating the energy it uses, while intensity is defined as tonnes of emissions of CO2-equivalent per €1mn of revenue.

https://www.ft.com/climate-leaders-europe-2022