It's not dumb as long as you ask questions (and are interested in the answer). The global ice sheets currently melt at a rate of 1.4 trillion tons per year. Bi

It's not dumb as long as you ask questions (and are interested in the answer). The global ice sheets currently melt at a rate of 1.4 trillion tons per year. Biomass of all living things is about 500 billion tons C. Let's pretend all of that is plant mass on land (most if it isn't), and let's just say there's 5 times as much water as carbon in plants (an overestimation at least for trees), and we arrive at only 2.5 trillion tons of water bound. So, if I my estimations aren't wildly off, increasing tree biomass even by a large factor won't help us significantly. Add to that that the rate of the ice melting is accelerating, and that the sea levels are also rising due to thermal expansion, and I don't think we can more or less discount the bound water in trees.