Calculation-reduction-offset: Once the carbon footprint is calculated, work is done on its reduction (improvements in energy efficiency, waste management, reduction of paper and plastics, etc.) with the ultimate goal of achieving a zero carbon footprint. The Palau de la Música Catalana was the first concert hall to achieve accreditation of CO₂ emissions neutrality for Scope 1 and 2 at the Catalan and Spanish state level. Scope 1 greenhouse gases are those generated directly by the activity carried out there, and Scope 2 refers to the electricity it consumes from the grid. Emissions of these types that could not be reduced have been offset through adherence to the Voluntary Compensation Program of the Generalitat de Catalunya. Currently, work is underway to also achieve neutrality for Scope 3 emissions, all those focused on emission sources more external to the organization, such as those in the supply chain.