Agence France-Presse: A “people’s conference” on climate change agreed in Bolivia Thursday to call for the halving of greenhouse gas emissions by 2020 at the next UN climate meeting in Mexico in December. Some 20,000 environmental activists, indigenous leaders and unionists called for “collective, then individual, obligations for the reduction of greenhouse gases,” instead of the non-binding accord adopted at the end of last year in Copenhagen, which the group dubbed a “failure.” The UN Ambassador …