We already have solar powered carbon sequestration systems, that require almost no maintenance over a period of a couple of hundred of years of operational life…
Until they burn or rot and release the carbon back into the air
Also trees only grow where trees grew in the past, so growing new forests will only capture the carbon that was released when the old forest there was burnt or cut
If you want to capture the most of the carbon, you cook the wood in an oxygen free environment turning it to charcoal and liberating volatile components (which could be used as carbon neutral fuel to run the furnaces)
Nothing can eat charcoal, so it could be stored cheaply
You would presumably capture the carbon using excess solar and wind power, which is also the cheapest power there is, sometimes going negative
Is your capture number including the cost of liquifying the CO2 for storage?
We already have solar powered carbon sequestration systems, that require almost no maintenance over a period of a couple of hundred of years of operational life…
Trees.
Until they burn or rot and release the carbon back into the air
Also trees only grow where trees grew in the past, so growing new forests will only capture the carbon that was released when the old forest there was burnt or cut
Decomp still sequesters carbon.
Sure, burning them releases a portion back, but not most of it…
What do you think comprises ash?
If you want to capture the most of the carbon, you cook the wood in an oxygen free environment turning it to charcoal and liberating volatile components (which could be used as carbon neutral fuel to run the furnaces)
Nothing can eat charcoal, so it could be stored cheaply