Planting trees is a popular way to mitigate climate change, but in northern and Arctic regions, it may not be an effective solution. A recent study published in the journal Nature Geoscience, found that tree planting in northern boreal and Arctic regions is not only ineffective at mitigating climate change, but may actually cause net warming. “Tree planting, in the many areas of the tropics and lower latitudes is of course something that can help be part of the solution to mitigate climate change,” said Jeppe Kristensen, lead author of the paper from Aarhus University in Denmark. “However, you can’t necessarily place that in a different context and expect it to have the same effect.”