There was a research paper at https://greenlab.di.uminho.pt/wp-content/uploads/2017/10/sle... a few years ago that attempted to evaluate the energy efficiency of many programming languages and that paper got a moderate amount of attention on the web [1] [2]. It probably shouldn't come as much of a surprise but programs that require less clock or CPU time can and usually do result in less energy usage. This paper and this video just help prove that a bit more.

[1] https://news.ycombinator.com/item?id=15249289

[2] https://news.ycombinator.com/item?id=24642134