Planting trees on 6.4 million hectares of northern taiga forest could remove 3.9 gigatons of CO2 by 2100 — five times Canada's annual emissions. Canada could remove more than five times its annual carbon emissions from the atmosphere by the end of the century by planting trees along the northern edge of its boreal forest, a new study suggests. In recent decades forests have slowly moved north in response to climate change — in particular the taiga area on the edge of the boreal forest, the massive belt of forest stretching across northern Canada, Europe, and Russia, where it transitions...