Bear in mind, that I would answer this differently about Bitcoin efficiency and energy usage if the question would be asked in a different manner, BUT:

While some claim that it's a "yes", it's actually a NO.

Bitcoin doesn't care (or people mining it) about environmental impact. Heck, most of the people in general do not care about environment.

Currently, the entire community is riding a speculative hype train to earn money, not to save the planet. Also, most miners (one of the most influential groups in Bitcoin) are based in China - does that strike you as an environment-savvy place?

This question reeks of the Californian idealogical bubble. What's next? Is Bitcoin diverse enough?