As to a few questions above, about wishing for a few mature trees here and there, a company 'More Than Trees' can plant or move very large and mature trees of almost any species. They have worked at Sage Valley, Congaree, Augusta National, et al. Of course a lot of such plantings are for McMansions in Atlanta suburbs. Planting almost mature trees along the driveway, house, hillsides, etc. is usually in landscaping plans for such.
From UC Davis...........
"Unlike forests, grasslands sequester most of their carbon underground, while forests store it mostly in woody biomass and leaves. When wildfires cause trees to go up in flames, the burned carbon they formerly stored is released back to the atmosphere. When fire burns grasslands, however, the carbon fixed underground tends to stay in the roots and soil, making them more adaptive to climate change.
“In a stable climate, trees store more carbon than grasslands,” said co-author Houlton, director of the John Muir Institute of the Environment at UC Davis. “But in a vulnerable, warming, drought-likely future, we could lose some of the most productive carbon sinks on the planet. California is on the frontlines of the extreme weather changes that are beginning to occur all over the world. We really need to start thinking about the vulnerability of ecosystem carbon, and use this information to de-risk our carbon investment and conservation strategies in the 21st century.”