National Energy and Environmental Security Act of 2007 - Expresses the sense of Congress that Congress should enact, and the President should sign, legislation to enhance the security of the United States by reducing its dependence on foreign and unsustainable energy sources and the risks of global warming by: (1) requiring reductions in emissions of greenhouse gases; (2) diversifying and expanding the use of secure, efficient, and environmentally-friendly energy supplies and technologies; (3) reducing the burdens on consumers of rising energy prices; (4) eliminating tax giveaways to large energy companies; and (5) preventing energy price gouging, profiteering, and market manipulation.