With the reduction in use of chlorofluorocarbon (CFC) and hydrochlorofluorocarbon (HCFC) gases in refrigeration and air conditioning systems has come an increase in the use of ammonia. Use of ammonia avoids the strong green house effect for which use of CFCs and HCFCs was banned, but it brings issues of it own. Much of the food we eat will have spent some time in storage chilled using ammonia. Continue reading “Hazards of Ammonia – it’s chilling!”