This is one of many examples of a class of problem where the technology is the easy part. There's room to improve the tech certainly, but the technology sufficient to solve the problem is already well understood.

The hard part is how to get people to actually do the necessary changes. To consume less, get fewer gas cars on the road, increase the amount of nuclear, hydro, solar, geothermal, and wind in the grid, and minimize coal and gas use. To reduce land use by cows, and increase land use by trees and native plants.

But maybe AI is the secret here. We have tools that are in the hype moment whose training data already contains several reasonable solutions to climate change. Maybe if AI "finds" the solution to climate change, people will finally listen