Until recently, carbon dioxide had been a strong candidate to displace hydrofluorocarbon (HFC)-134a as the refrigerant of choice for a new generation of automotive air conditioners. HFC-134a has a ...

LONDON — Rajiv Singh started thinking about how to do his part to fight global warming 15 years ago. Singh, a scientist at Honeywell’s lab in Buffalo, N.Y., began running computer models of tens of ...