[insky]

Large wattage items aren't on for that long in my experience. We could get our electric use right down and probably run it on solar during the summer months, save for the fridge/freezer, fan in the bathroom, the kettle and hair dryer.

Even with our paltry electric use we are still getting high bills (UK)! Expense is the biggest incentive for us to get our electric use down.

If server farms have become a bigger polluter than the aviation industry, I see that as a challenge. Use the hardware as efficiently as possible. Caching layers could hugely reduce CPU use. Perhaps we could measure an app's power consumption aswell as bandwidth use?