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.
Yahoo Search displays Web results from around the internet. These include results from Yahoo websites, and non Yahoo websites. Good to know: When youâre requesting that a specific search result be removed from Yahoo Search, itâs important to know whether the result is from a Yahoo website, or a non-Yahoo website.