AOL: Planting trees to help fight climate-change works, right? Well, according to a new study that's not always the case. It turns out that conifer trees, like evergreens, may actually cause temperature increases where they've taken root in place of broad-leafed trees. For example, look at Europe where the study was focused.
Once upon a time, its forests were largely leafy deciduous trees. Now, a majority of Europe's trees are managed by humans, and we've been planting trees like pines and spruces...