OK, I read this and I had some disbelief. It starts with a total of 23 billion tonnes of ore, and ends with a volume equivalent to 1.5 meters of the whole coun

OK, I read this and I had some disbelief. It starts with a total of 23 billion tonnes of ore, and ends with a volume equivalent to 1.5 meters of the whole country of Switzerland being excavated per year. That seemed high, but it turns out that independent estimates of just coal excavation are 8 billion tonnes per year. So my disbelief was wrong. And then, looking at it the other way, this makes it evident how much burning all that coal could change global CO2.