HFC emissions data

By using atmospheric measurements, the authors of a recent study published in the Proceedings of the National Academy of Sciences of the United States of America (PNAS) have found that the total CO2-equivalent emissions of the five most common HFCs from countries that are required to provide detailed, annual reports to the United Nations Framework Convention on Climate Change (UNFCCC) increased from 198 (175-221) Tg-CO2-eq?y-1 in 2007 to 275 (246-304) Tg-CO2-eq?y-1 in 2012 (+39%).