New Scientist: Everyone on the planet could get identical greenhouse-gas emission rights as part of a drive to halve emissions by 2050, according to a study by Chinese scientists. The work was presented on the sidelines of a UN conference on fighting global warming that is currently taking place in Poznan, Poland. It would force nations such as the US, which have used the most fossil fuels since the Industrial Revolution to buy emission rights from poor nations. “Developed countries [should] …