into the atmosphere in 2012 than in the previous year. India contributed 7.7 % more emissions in 2012. Path to catastrophe Not only must the increase stop, the researchers said, but industrialized nations must achieve a global reduction in greenhouse gas emissions. Time is running out to stop the world from reaching a dreading global warming threshold. The world is on a course with current emission levels to reach a rise in global temperatures of 2 degrees Celsius or more and end up in the worst climate change scenario issued by the U.N. panel on climate change. The study includes a carbon atlas, which shows levels of pollution emitted by each nation and their development over the last 50 years. In 2012, the largest contributors of greenhouse gases were China with 27 %, the United States with 14 % and the European Union with 10 %. On an individual basis, China and the EU were at the same level, with 7.7 tons of carbon gas emitted per person and year. Americans still polluted the most by far, with more than 17 tons of carbon gas emitted per person in 2012. The nuclear renaissance:What went wrong ?