Without additional regulation, burning ammonia in ship engines could cause serious impacts on air quality that could result in more than 600,000 additional premature deaths per year, according to new MIT research.
Technically not green, but I thought you guys would be interested
The funny thing about air conditioning fluids, is that we are actually moving from HFC to propane and ammonia, due their green house effect.
Aka the thing that CFC were supposed to replace because they were safer.
It is a circle.