Environment policyArticles 11 and 191 to 193 of the Treaty on the Functioning of the European Union (TFEU). The EU is competent to act in all areas of environment policy, such as air and water pollution, waste management and climate change. Its scope for action is limited by the principle of subsidiarity and the requirement for unanimity in the Council in the fields of fiscal matters, town and country planning, land use, quantitative water resource management, choice of energy sources and structure of energy supply.