The Environmental Protection Agency and some large business, including Wal-Mart, are aggressively promoting the sale of compact fluorescent light bulbs as a way to save energy and fight global warming.

NPR: CFL Bulbs Have One Hitch: Toxic Mercury

We could transform America right now, rebuilding our roads and our bridges and our airports and also rebuilding a new infrastructure for the 21st century -- high-speed rail and a new generation of air traffic control that could actually save 15 percent of fuel costs and as a consequence reduce global warming.

WHITEHOUSE: Remarks by the President at a DNC Event in Washington, DC