Hacker News new | past | comments | ask | show | jobs | submit login

A lot of assertions there. You lost me at “Forestry changes aren't nearly enough to offset anthropogenic emissions from other sectors”. Can you explain your math there? Is there a limit to how much carbon we can warehouse in trees (living and milled)?

If you keep harvesting trees and store them in a way that they won't rot or burn, there is no practical limit on the total amount of carbon that can be sequestered that way. There is still a limit on the rate at which carbon can be sequestered that way. To stabilize concentrations of atmospheric CO2, the sequestration rate must match current rates of anthropogenic CO2 emissions. If significant feedbacks kick in, the sequestration rate needs to be higher than current anthropogenic emission rates.

Here's one of the more optimistic studies I have seen about forestry-based approaches to curbing CO2:


The authors estimate that afforestation and other positive land use changes could provide up to 37% of the CO2 reductions needed through the year 2030 in order to stay under 2 degrees of warming. The other 63% has to come from elsewhere.

Guidelines | FAQ | Support | API | Security | Lists | Bookmarklet | Legal | Apply to YC | Contact