Depends on how long you want to run it and your utility costs, performance/watt is good on newer chips like these.
It would probably be better for the environment if we force software devs to optimize, so we could have all the modern goodies but using like 1/1000th of the energy to get there.
Back in the 80s and 90s, programmers would proudly shave off kB of code and use little hacks to pull every last bit out of limited resources. Now we run like 90 instances of a browser, requiring like 2 GB of RAM for a simple chat app :D