Deutsche Presse-Agentur: German scientists called Tuesday for the world to accept per-person quotas for carbon dioxide emissions to kick-start a global trading scheme where poor nations will benefit. The Potsdam Institute for Research on Climate Effects said everyone on the globe should be allowed 5 tons of carbon per year. That is just one quarter of the average per-person emissions for a US citizen, but still far above emissions in poor nations. The government-funded institute said the current …