National Public Radio: Workers in the Gulf of Mexico are using oil containment booms to sop up oil and protect coastlines from the approaching slick. Commercial booms are usually made of plastic. But an alternative source for the booms is found on the floor of salons across the country. As it turns out, hair adheres to oil pretty efficiently, which is why your hair gets greasy. Now salons are donating their discarded locks to help with the Gulf Coast cleanup. A group in San Francisco has been …