Carbon Pulse: The diversity of the pledges made by countries to the UN climate summit in Paris creates accounting challenges for carbon trading and might require international oversight, according to a Wuppertal Institute report. The Paris Agreement marked the first time nearly all countries took on national commitments to help battle climate change, goals known as Nationally Determined Contributions (NDCs). But the pledges varied in nature: some were absolute GHG emission reductions, some were intensity-based...