Efficient CO2 refrigerant solutions for warm ambient temperatures was a key topic of discussion at the Gustav Lorentzen 2014 (GL 2014) Conference on Natural refrigerants, which took place from 31 August to 2 September 2014 in Hangzhou, China. R744.com, a silver sponsor of GL 2014 together with market development company shecco, reports on the latest technological developments and research into expanding the use of CO2 transcritical to southern climates, which represent a si