I think that if we take all the abandoned farmland and let it regrow and form back into a natural habitat for living things then over time the same land that was cleared for cattle and other livestock can reform back into a space where there can be trees and other native plants which all can store carbon dioxide but not only can the trees and plants so can the soil. This could help reduce the carbon dioxide in the air simply by allowing for the regrowth of native forests where they once were. It also is better than just planting random trees in random places because that has been proven pretty ineffective because either the place where the trees are planted is suitable to host a forest or the trees aren’t watched and help enough at their young stages to survive.