Comment by graemep

> Too bad that we are currently doing the exact opposite (cutting down more forest than is regrown)...

"Plants" is not a synonym for "trees". There are grasslands that are significant carbon sinks - even farmland managed in the right way can be a carbon sink . The oceans (which have a notable lack of trees) are a major carbon sink (although this paper is not talking about this, if I understand the abstract correctly).