I love forests, any sort, but reforestation the right way, as Terra seems to support, takes more time than some are saying we have. The wrong way becomes the right way when it is all you have time for. Iron fertilization of oceans is promising for albedo already, if we can efficiently synthesize these terpenes in the right ratio to seed clouds perhaps that would buy some time.
I cannot help but wonder what would happen if we released these chemicals at the norther coast of the Sahara while also planting scrub brush, grass, and trees there.
I have some bad news,the US, China, and India are not going to turn on a dime like the more optimistic green energy revolution people hope. We have time to plant plenty of trees before we turn the corner. It's just the way of things.
Fortunately humans are adaptable and in many parts of the world already living in conditions significantly hotter than predicted in the medium term (50-100 years).
I’m much more concerned about the cure being worse than the disease when it comes to novel methods of affecting climate. Plant trees, replace coal/oil with nuclear and solar, keep up on forest maintenance, etc.
I'm sure you are aware that there's way more going on than just a slight increase in average temperature (otherwise maybe ask the people on maui, greece or canada if they like their slight increase in temperate), but I agree that we should be careful with any radical cures.