We can muster whatever we want if there's sufficient need/desire. In energy-tech, a useful metric is energy-return-on-energy-investment -- a saudi oil well ret

We can muster whatever we want if there's sufficient need/desire. In energy-tech, a useful metric is energy-return-on-energy-investment -- a saudi oil well returns 40 units of energy for each unit of energy required for extraction, tar sands are something like 3:1, solar panels are something like 5:1. Taking that mindset, what's the ratio of CO2-sequested-for-CO2-required-to-mine? Yes, we can get better numbers if we electrify all the heavy machinery and power it with solar, but given that heavy mining trucks are largely fossil fuel powered, where are we today?