Agence France-Presse: Hundreds of billions more dollars are likely to be needed to reduce greenhouse-gas emissions by a 2030 target, according to UN estimates published on Friday ahead of global talks on climate change. The report, to be presented at the December 1-12 conference in Poznan, Poland updates 2007 estimates that said investment to mitigate carbon emissions had to be ramped up in the coming years, reaching between 200-210 billion dollars annually in 2030. The goal, in this benchmark …