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>> reporter: isa, they point out as you do it doesn't include the biggest users of coal. the time frame are elusive. crucially ber talking about coal, the dirtiest of fossil fuels, not the only one. it is a question of what these countries do next. if, for example, they simply replace coal with natural gas, yes, that's lower carbon, but it's not zero carbon and that sort of move could even delay by decades a country's move to fully embracing renewable energy. the british government is keane to point out this is a momentous turning point and shows the end of coal is now in sight. we know that g...

>> reporter: laura, good morning. the british government is keane to show here today it is making real progress, convincing countries to give up burning coal for electricity. so in its words, it says it's organized a coalition of 190 countries and organizations committing to phasing out c coal-fired electricity and ending investment in new coal projects. there are some obvious points here that critics point to that notably the big coal users aren't included, like the u.s. and china. and this does only cover coal, not the burning of other fossil fuels. but the british government's point is that...

I'm sure the white house is keane for it to not stick to him until the race. after tim tebow hit his touchdown on sunday, made his touchdown, 9400 tweets per second. >> does that say something about football or tim tebow or both, he is a growing phenomnon himself. >> there was another oops moment. we go back to the gingrich thinking it was the wrong sport. every candidate has their oops moment, you have to give them a base. >> tim tebow -- maybe under his eye black. >> you know, what tim tebow does, hes th s thçhe has the p wrist. >> how nasty will south carolina is get, that is next on "now...