Making H2 for PLUG fuel cells produces massive amounts CO2, the story that has been swept under the rug.
" Formic acid (like coal and all other carbon sources) gives off CO2 -- no too environmentally friendly is it. "
The Mantra Technology #2 converts the CO2 back into formic acid, thus very environmentally friendly and recylcable!!!!! PLUG's H2 source is from burning methane gas to make some H2. Producing all sorts of air polutants included massive amounts of CO2