I had a thought to schedule the daily builds at builds.robur.coop when the energy prices are low. My suspicion is that there is a (strong?) correlation between energy prices and CO2 emissions - lower prices means less CO2. Is there data backing up this idea?
@reynir https://energinet.dk/ has a 'live' energymap in Denmark, saying where the energy is sourced and the emissions per kWh :)
They have even more data available if you dig around :)