Well, yes, generally they do, especially in the tropics. But there is scientific uncertainty as to exactly how much, and there are some special cases where some types of trees in some places don’t lead to net cooling and carbon sequestration. That’s my read anyway. Science shouldn’t be censored of course, but some scientists are either really bad at communication or they like to make a name for themselves by trying to grab headlines with contrarian claims. Not that I have all the answers on how to communicate uncertainty concepts to a non-scientific audience. Now if you’ll excuse me, I have to go warm up my super-axe-hacker, which can chop down four truffula trees in one smacker.