At costs for Carbon Engineering’s new paper (from Keith et al, June 2018) at $94/ton, this is about $26 trillion.
To consider offgassing from the oceans and other sources, round up to 1,000 Gt CO2, or $52 trillion at $200/ton.
Per Gt CO2 at $200/ton is $52 billion per Gt CO2.
1 ppm CO2 = 2.12 Gt carbon or 7.76 Gt CO2, so 100 ppm CO2 is 776 Gt CO2.
At $200 ton CO2 removal, 50 ppm atmospheric CO2 drawdown (400 ppm CO2 to 350 ppm CO2) costs $20 trillion, or 100 ppm CO2 (776 Gt CO2) to get to 300 ppm is $40 trillion.
These numbers are simplified and do not consider things like off gassing of CO2 from the oceans when atmospheric CO2 is reduced. Hansen, Target Atmosphere 350, 2008, paragraph 1, page 227 Will there be net costs or net profits/benefits from decarbonizing?īelow are some thoughts on costs based on Hansen 2008: Can we feasibly decarbonize and build a CO2 removal infrastructure in 10 years or will it take 50 years? Net costs of emissions reductions are important. Time and rate of CO2 removal (negative emissions) are important.
#IS A DAISY CO2 200 WORRH MONEY PLUS#
Net savings (billions US Dollars over 30 years, current value) Removal Plus Storage at $10/ton CO2.
Costs of abrupt sea level rise $200 to $800 trillion over 30 years, current value.
*** At $20/ton CO2 removal $5.2 trillion $8 trillion *** At $100/ton CO2 removal $26 trillion $28 trillion *** At $200/ton CO2 removal $52 trillion $55 trillion
Net cost (billions US Dollars, current day) Cost for Removal Removal Plus Storage at $10/ton CO2.
Total atmospheric CO2-EQ reduction in Gigatons (Gt) 1,000.
How much CO2 reduction, how much does it cost, and what’s it worth? These costs assume that we can do what it takes to return CO2 to somewhere near 300 ppm far faster than current climate culture suggest for climate reform (10 to 20 years.) It also assumes that 300×2050 (300 ppm CO2 by 2050) restabilizes abrupt changes that have already begun and that geoengineering strategies are not deployed (like refreezing the Arctic or solar radiation management.) At the very bottom is a rationalization of how we can afford costs–if benefits do not outweigh costs creating a net profit scenario, and also very important–how we deal with 36 percent of current warming caused by non CO2 greenhouse gases: Further down are thoughts on how I arrived at these numbers. We have been moving towards the answers to these questions forever it seems, so here goes: doi:10.1016/j.joule.2018.05.006 How much CO2 reduction, how much does it cost, and what’s it worth?