The Winter Olympics are over, but their energy supplier, Enel, is rightly proud of the feat it pulled off: 100% low-carbon electricity supply for the games. But there is a twist. That 100% was only possible thanks to one thing: carbon credits. The energy major reported it was supplying 85 GW of electricity to the Olympics and Paralympics, yet not all of those gigawatts came from wind and solar installations. Some of them did, but the rest came from baseload generation facilities, “cleaned up” with so-called “guarantee of origin”…