we underestimated field application of there products...It's relatively old article but very interessting, especially this :
"A lot of our customers are in the underground mines and some of the biggest problems they have is emissions," he said. "So, we were looking for a company to partner with to try to reduce emissions, just because there's a really big problem with the mines at the moment."
Whynott also pointed out that dealing with emissions comes at a cost.
"How the mines work, a lot of it, is they do a cost per tonne lots. So anytime we can walk in and save on their ventilation, on their fuel, that actually changes their cost per tonne for mining, which is huge out there..."
source : https://www.cbc.ca/news/canada/sudbury/sudbury-mining-dynacert-diesel-emissions-1.5369730