Hamburg spent over 1 million euros on Nigerian stove certificates claiming 75,000 tons CO2 savings. No stoves were installed during 2018-2020 despite claims. UN auditors criticized lack of new stoves since 2015. City ignored audit court warnings on project failures. Direct contract to Atmosfair skipped public tender violating rules. India project completely flopped shifting funds to Nigeria. Officials misled parliament on project status. Stoves existed only on paper due to Nigerian security issues. Hamburg booked ex-post savings without verifying oven deployment. Audit court called it donation not verified CO2 offset. City now halts foreign compensation projects after exposure. Green senator admits procurement flaws but blames past practices. No proof funds built promised 12,000-15,000 stoves timely. Opposition labels it indulgences trade for emissions. Local tree planting now replaces African schemes.