The United States increase in alternative energy sources is increasing due to federal, state, and local tax and other incentives, as well as mandated state goals. The United States is significantly behind China in its renewable sector investment intensity. Efforts to join international agreements or introduce long-term, large scale reductions in emissions have met with opposition in Congress and the private sector.
Sources: BP Statistical Review of World Energy 2011, Energy Information Administration, Pew Charitable Trusts, news and wire services
