The UN’s Intergovernmental Panel on Climate Change (IPCC) has confirmed that the automotive HFO refrigerant R1234yf has a GWP of less than 1.0, making it lower than CO2. IPCC has accepted the findings of an independent, peer-reviewed paper, published last year and reported by RAC. The paper, in volume 51 of Reviews of Geophysics, was the first to calculate the GWPs of all fluorocarbon-based refrigerants using all available atmospheric data, taking into account local atmospheric patterns. The study found R1234yf to have a GWP of less than 1. CO2 is considered the baseline with a GWP equal to 1. Earlier studies had calculated the GWP for R1234yf at 4. Nearly half a million cars are now reported to be on the road using R1234yf, and by the end of 2014 the number of such vehicles is expected to exceed 2 million. (Source: The HVAC&R Industry, February 27, 2014)