Also, avoid cryptocurrencies, build simpler web pages, prefer offline (desktop/mobile) to online (web/cloud) solutions, use documentation instead of googling, prefer centralized to distributed systems if possible. All these save energy.
There is an awareness of power consumption of data centres.
Why not start marketing code to power consumption metrics?
What about fastest-to-market and above average code base = marketing argument? Or even scientific paper?
I think here is is also important to look at smaller companies and not only FAAG.