As a unique energy buyer, the Bitcoin network will accelerate the renewable transformation of global energy. If the Bitcoin mining method is combined with renewable energy production and storage, it is particularly suitable for accelerating the transformation of energy. Bitcoin miners are unique energy buyers because they provide a highly flexible and easily adjustable interruptible load.
Energy cost isn't a serious issue for bitcoin as long as the end user or miner would build an efficient equipment. Cleaner power source could help our environment in terms of operation, but the most important here is adoption. If many individuals will use btc, profit for miners would increase due to increased transactions.