This law sets out a comprehensive framework for Spain's transition to a more sustainable, low-carbon economy. It establishes targets for reducing greenhouse gas emissions and increasing the share of renewable energy in the country's energy mix. The law also includes measures to promote energy efficiency, sustainable mobility, and circular economy practices. It establishes a framework for financing the transition to a low-carbon economy and provides for the creation of a new regulatory authority to oversee the implementation of the law. The aim of the law is to ensure that Spain contributes to the global effort to combat climate change and to promote sustainable development in the country.