4 ms·

CO2 concentration in atmosphere is .04% not .4% But Yes is too low as a source for this process.

• rocqua 3y ago
  Estimates I found (in one article, I linked it somewhere else) put the energy usage of CO2 capture from ambient air at about 2800kwh per ton of CO2, someone else calculated one ton of CO2 would produce 376kg of propane. Which is about 5254 kwh. So it would be a significant hit to efficiency, changing it from about 90% to 60%. But that doesn't bring the efficiency to stupidly low levels.
• nonethewiser 3y ago
  So lets pump more CO2 into the atmosphere.
• gcanyon 3y ago
  > .04%, not .4% Give it time, we're working on it...
  • zaroth 3y ago
    > Concentrations of CO2 in the atmosphere were as high as 4,000 ppm during the Cambrian period about 500 million years ago, and as low as 180 ppm during the Quaternary glaciation of the last two million years. So a range of 0.018% to 0.4% over the last 500 million years. We’re currently at ~420ppm, and human impact is estimated to have been about +140ppm since the 1700s where we had been at 280ppm for the ~10,000 years prior. If the planet ever hit 0.4% again it would be due to natural not anthropogenic reasons.