This is wrong. So very wrong. “Stop flying as much”? Dude, the majority of people that I know didn’t fly airplane a single time in their lives. Small percentage flew perhaps a few times in their decades-long lives.
The lists misses more reasonable things:
ditch whatever modern “high energy demand” fad there is, be it bitcoin mining or electric car
spend less time on activities that rely on energy consumption, be it online browsing, or playing high-demand video games
vote for whatever party there is, that wants to build nuclear power plants and postulate to bring cheap energy to every household
vote for whatever party plans to do something about urban infrastructure, so that mass transit and bikes become plausible alternative to a car
as much as possible avoid Chinese stuff, avoid enterprises that outsource their work to China, yes it means skipping yet another iCrap announced
do not exchange hardware/electronic/digital devices that often, ffs the cpu/gpu/memory values do not matter that much
don’t change your diet, but consider improving it - eat less, waste less, do not overindulge on delicacies
learn as much as you can about things that reduce your reliance on the society and the products/services it provides