Is mercury light or silver?

By Chelle Delaney: QCS Associate Publisher Let there be (white) light. Wal-Mart made headlines with its sale of compact fluorescent light (CFL) bulbs. The U.S. Environmental Protection Agency and the U.S. Department of Energy have backed up Wal-Mart. At the Web site – – you’ll find that those two government agencies, the EPA and DOE, […]