Ann: Cleansing Notice, page-69

It is why over time the waste dumps will be able to oxidise and often burn. The air pressure is not static so all the dumps will breathe allbeit slowly. Those dumps from the ETSA - Flinders Power's 40 years of operation are not insubstantial and they are not carbon free. Exact tonnage I don't know but the original study from the late 1970's said 7 cubic meters would be mined for each tonne of coal. So in the order of a Billion tonnes. The dark dumps (smoked out here) are that thanks to the shale-mudstone overburden's carbon content. MHO. DYOR. 2022? Google-