Apolline Blandin, cryptocurrency research lead at the Cambridge Center for Alternative Finance, joins the show. In this episode:  The Cambridge AltFin research agenda The motivation behind the Cambridge Bitcoin Electricity Consumption Index How they determine Bitcoin's electricity consumption How Bitcoin's energy usage can be understood in context The genesis of their new geographical mining estimates Why high granularity estimates of mining location are so important to determine its energy mix How and why Bitcoin hashpower migrates on a seasonal basis Why there is so much spare hydro capacity in Sichuan and Yunnan Surprising country-level findings The most defensible academic approaches Apolline has seen so far Why the per-transaction cost estimates of Bitcoin are misleading The prospects for wind, solar, and natural gas for bitcoin mining