In 2011, Seixal Town Council joined the Covenant of Mayors, thereby making a commitment to reduce greenhouse gas emissions by more than 20 %, increase the contribution of renewable energies to more than 20 % and reduce energy consumption by more than 20 %. The Sustainable Energy Action Plan (PAES 2020) was drawn up in partnership with AMESEIXAL, which included 41 measures/actions to rationalise energy consumption and increase the use of renewable energy sources. Nine years after the PAES 2020 was drawn up, it can be seen that energy consumption in the municipality of Seixal has fallen by 33 % and CO2 emissions have been reduced by more than 47%, substantially exceeding the targets set for 2020. On 5 April 2023, the Sustainable Energy and Climate Action Plan for the Municipality of Seixal 2030 was approved, renewing the commitments made.