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! Answers was created to replace Ask Yahoo! , Yahoo!'s former Q&A platform which was discontinued in March 2006. The site gives members the chance to earn points as a way to encourage participation and is based on Naver's Knowledge iN.Yahoo! Answers is available in 12 languages, but several Asian sites operate a different platform which allows for non-Latin characters.ahoo! Answers was created to replace Ask Yahoo! , Yahoo!'s former Q&A platform which was discontinued in March 2006. The site gives members the chance to earn points as a way to encourage participation and is based on Naver's Knowledge iN.