I made a mistake from remembering something I read a long time ago and corrected my comment accordingly. I also made it clear that I thought the sentence for the protesters was way too harsh, I just took issue at the words "peaceful protest" when people were injured as a fairly direct result of their actions.
I definitely support JSO over the oil companies and whoever they pay off in government, but I don't think claiming a protest is "peaceful" should be a "get out of jail free card". Call it a justified protest or whatever, but the vast majority of what protesters call "peaceful protest" is actually not peaceful at all, as the actual peaceful protesters aren't having to defend their agressive or unpeaceful actions.
By "burn it" I meant turn it into charcoal... Charcoal averages 80% carbon (range 50-95%), whereas depending on the type coal ranges from 60-92% carbon, with the purest type, anthracite, being 86-92% carbon
Given a mass production system would likely result in more uniform carbon content near the top of the range, I don't think it's unreasonable to suggest that they could be swapped out pretty easily