The ratio of heavy carbon (carbon - 13) to light carbon (carbon - 12) reveals whether the gas came from burning forests or not. (newscientist.com)
Heavy carbon deposits on the valves are caused by worn valve guides and seals. (mechanics.stackexchange.com)
Secondly, focussing on delivering turnkey hybrid power solutions, which is of immense requirement in remote power installations such as island nations, most of which either can not afford the kind of diesel or fuel import costs that exist at this particular stage, or have mandates to move away from heavy carbon footprint in order to meet climate change goals. (pv-tech.org)