There is too much greenhouse gas (GHG) in Earth’s atmosphere, which has led to ever-increasing global warming, which has led to many disasters (the SoCal fires being the most recent). The dominant GHG is carbon dioxide (CO2), accounting for about 80 percent of the warming caused by greenhouse gases.
There are several relatively easy ways to get CO2 out of the atmosphere. The easiest is probably to plant more trees (the trees continually sequester CO2 as long as they are growing), build relatively long-lived structures from the mature trees’ wood, and bury any wood residue as described in an earlier post referenced in this post.
Then also it is relatively easy to continue the rapid advances in renewable and zero-carbon electricity production and have this displace energy sources (including for mobility) that currently generate GHG.
Large bodies of water naturally absorb CO2. If we remove this gas from oceans, sequester it, then the oceans will absorb more from the atmosphere. This last technique is the primary subject of this paper.