Do you really believe that?

There are so many fake news out there that we need to start by thinking a bit just before believing it...
How could mining gold have less cost than mining bitcoin?
Gold can be mined in several ways, and on the easiest, they dig massive holes, and wash all the dirt to separate it from gold... if we take into account the landscaping, fuel and electrical consumption, massive machinery, manpower, etc.... is it possible that this is less expensive than setting up a few ASICs?
And how about the blasts? or the places where gold is embedded in other rocks and they use deadly chemicals to extract it (mercury if I am not mistaken) - ending up in water flows?
Which methods and examples are being used to consider the 1$ gold production cost?
So, let's say that these guys are only speaking about energy cost, and I will say only 3 things:
- energy cost to produce $1 worth of BTC - is this considering prices in December 2017, or August 2018, or when?
- how may large mining facilities run on renewable energy?

how many small mining facilities run on renewable energy? I don't have the direct answer to this, but checking the renewable energy developments in some countries and the constinued rise of hashrates, we can get some clues...
- energy cost on gold extraction is by far the lesser problem... and on BTC is the ONLY problem
So, how many gold mining facilities, or production plants run on renewable energy?