The authors point out the paradox that in countries with high gas-dependent electricity production (e.g. Iran), Bitcoin's water consumption is lower, but its CO2 emissions are higher. 
Discussion
Immediately afterwards it is explained that mining in countries (e.g. Canada and Norway) with electricity production with a high proportion of water-intensive, renewable energies (then called hydroelectricity) is responsible for this high water consumption. 
The authors are actually saying that the energy transition to renewable energies is bad because it uses too much water. It's unbelievable. Or is it just Bitcoin that isn’t allowed to do that?