Perhaps we should build better software that helps to reduce power in electrical devices?
A decade back I remember every office in a building I worked in (in the UK), leaving their machines on pretty much 24hrs. The building manager suggested the idea of cutting electric between certain hours, and people protested.
Phone chargers, desktops, monitors were all on. Probably for 16 hours of each day when no one was there. Even when people were there the machines were barely busy.
Computers could have been suspended to ram or turned off. I still see this even in offices with modern PCs that can boot quickly and suspsend to ram with ease (used to be touch and go).
Could spare CPU cycles be farmed out?
I'm glad to see better power saving settings in newer CPUS, and operating systems. But this needs to be better. Some mobiles can hold a charge for a week even with voice calls. Other smartphones are getting charged daily, some with negligable use. Charging batteries takes more power than you get back out.
Lots of small energy efficiencies could really help. Stuff like giving screen savers the boot, having sensible power defaults in OSs etc.