Overall, the ECO schemes were less cost-effective in terms of saving CO2 than previous similar schemes
The NAO estimates ECO cost suppliers and central government £92 to £95 per tonne of CO2 saved compared to £34 for CERT and CESP
Annual expenditure, £bn
CO2 savings per year, Mt
Previous schemes (CERT and CESP)
Energy Company Obligation
0
5
10
15
20
25