Ammonia: Green Ammonia.  Not just a stinky-smelling household cleaning product any more.  Ammonia has also been widely used as a fertilizer for the last century.  Now, using renewable energy, and a new method for making ammonia, researchers and entrepreneurs believe green ammonia can become a significant clean fuel source for generating electricity and powering ships. “From Fertilizer to Fuel: Can Green Ammonia Be a Climate Fix?”  www.e360.yale.edu  1/20/22.  “Ammonia – a Renewable Fuel Made From Sun, Air, and Water – Could Power the Globe Without Carbon”.  www.science.org  7/12/18. This article from science.org concerns an Australian fuel cell that can convert renewable electricity into carbon-free ammonia fuel.  Yara Clean Ammonia in Norway is working to develop clean ammonia as a fuel in the shipping and food production industries. www.yara.com/yara-clean-ammonia/