Over the last 30 years man-made CFCs have been the main cause of stratospheric ozone depletion. CFCs however, are not the only ozone-depleting chemicals. Other ODCs include the methylhalides, carbon tetrachloride (CCl4), carbon tetrafluoride (CF4), and the halons which contain bromine instead of chlorine.
Part of the Internet applications glossary: Yahoo! is an Internet portal that incorporates a search engine and a directory of World Wide Web sites organized in a hierarchy of topic categories.
Contact Yahoo Customer Service. Contacting Yahoo Customer Service Center. Yahoo could be considered the second fiddle to Google in terms of Internet properties and ad integration. While Yahoo is a huge company they are nowhere close to the size of Google and they offer fewer customer service opportunities.