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.
Can't remove yahoo as default search engine. BigFishSales. 16.08.14 14:43. Hi; in my chrome settings, there is no drop down showing google as a search provider option. when i go into 'manage search' settings and add google, there is no button that says 'make default' and next to yahoo there is no X to remove it.an't remove yahoo as default search engine. BigFishSales. 16.08.14 14:43. Hi; in my chrome settings, there is no drop down showing google as a search provider option. when i go into 'manage search' settings and add google, there is no button that says 'make default' and next to yahoo there is no X to remove it.