The Energy Independence and Security Act (EISA) was enacted in 2007 to enhance the United States' energy security and reduce dependence on foreign oil. It aims to improve energy efficiency, promote the use of renewable energy sources, and reduce greenhouse gas emissions. Key provisions include increasing fuel economy standards for vehicles and supporting the development of alternative fuels. EISA also established energy efficiency standards for appliances and lighting, encouraging the adoption of technologies that consume less energy. Additionally, it supports research and development in renewable energy technologies, such as solar and wind power, to foster a more sustainable energy future.