Justin Gillis has written a sophisticated piece for the NY Times about the role of trees in storing CO2 and how the risk of climate change could be accelerated if tree populations are decimated. I respect that the piece has an honest debate about the benefits and costs of CO2 for trees and the piece highlights what leading climate scientists do and do not know. Gillis points out the high frequency risks that forests increasingly face because of climate change. These include bug invasions and droughts and temperature shocks that can kill off a forest which will take decades to grow back. This lack of resilience is an important point that merits more research.