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> We are going to need technology that will pull CO2 from the atmosphere. Yes, doing that is very energy intensive Wouldn't you need even more energy to pull i
by seanwilson 7y ago
> We are going to need technology that will pull CO2 from the atmosphere. Yes, doing that is very energy intensive
Wouldn't you need even more energy to pull it in that it took to release it? So to undo 10 years worth of global emissions, you'd need more energy than was generated worldwide over those 10 years? Sounds impossible.
- jlmorton 7y agoNo, technology like Direct Air Capture requires about 250kWh as a theoretical minimum to capture 1 ton of CO2. Current methods require about 600kWh. Meanwhile, one ton of coal generates about 2,500kWh of electricity.
- jandrewrogers 7y agoThis is not correct. Per the DAC literature I've seen, the fully burdened energy cost to capture a ton of CO2 is around 12 MWh. The numbers you provided appear to violate the laws of thermodynamics on their face, whereas the 12 MWh number does not. The 250kWh number likely only accounts for the operational energy requirements, not the fully burdened energy requirements of creating the consumable inputs.
- deleted 7y ago[deleted]