Covenant of Mayors is a movement involving local and regional authorities, voluntarily committing to increasing energy efficiency and use of renewable energy sources on their territories. By their commitment, Covenant signatories aim to meet and exceed the European Union 20% CO2 reduction objective by 2020. Covenant's website offers a database of sustainable energy action plans uploaded by local authorities from around Europe, monitoring action plans, toolkits, webinars, as well as technological and methodological materials.