The Alliance to Save Energy is a nonprofit organization that promotes energy efficiency worldwide. It has over 60 staff members and an annual budget of $12 million. The Alliance represents policy leaders, environmental groups, businesses, and academia. It advocates for energy efficiency policies and works on initiatives in research, advocacy, education, and communications. Major federal energy efficiency laws and programs have been passed since 1975. Energy efficiency is the largest source of energy in the US, exceeding petroleum, natural gas, and coal. It has advantages like being the lowest cost source of energy and having no emissions. However, it also has disadvantages like requiring many individual decisions and upfront costs. The American Recovery and Reinvestment Act provided $26 billion for energy efficiency