The world has warmed more than one degree since pre-industrial times, the UK Met Office has declared, passing a key milestone for the first time as the monster El Nino gave climate change a kick along. The global mean temperature in the first nine months of the year was 1.02 degrees above the estimated level before the industrial age ramped up carbon emissions from the burning of fossil fuels and accelerated land clearing. The symbolic marker comes just weeks before teams from about 200 nations will meet in Paris to thrash out a new global climate treaty aimed at limiting warming to 2 degrees. Pledges so far indicate a 2.7-degree warming is likely - assuming all the promises to curb...
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