Agence France-Presse: Emissions of greenhouse gases are rising so fast that within one generation the world will have used up its margin of safety for limiting global warming to 2°C (3.6°F), an international team of scientists warned Sunday. A report by the Global Carbon Project (GCP), published two days ahead of the UN climate summit on Tuesday, found that carbon dioxide (CO2) emissions from fossil-fuel combustion and cement production grew by 2.3 percent in 2013, reaching a record 36 billion tonnes of CO2. It predicted...