To fairly divide the climate change fight between rich and poor, a new study suggests basing targets for emission cuts on the number of wealthy people, who are also the biggest greenhouse gas emitters, in a country. Since about half the planet's climate-warming emissions come from less than a billion of its people, it makes sense to follow these rich folks when setting national targets to cut carbon dioxide emissions, the authors wrote on Monday in Proceedings of the National Academy of Sciences.
... Rich people's lives tend to give off more greenhouse gases because they drive more fossil-fueled vehicles, travel frequently by air and live in big houses that take more fuel to heat and cool. By focusing on rich people everywhere, rather than rich countries and poor ones, the system of setting carbon-cutting targets based on the number of wealthy individuals in various countries would ease developing countries into any new climate change framework, Chakravarty said by telephone.