Josep “Pep” Canadell, executive director of the Global Carbon Project, says he believes countries large and small need to think twice before pledging to collectively plant billions of trees as a primary emissions-reduction strategy to meet climate action goals. “We have somehow sold reforestation as an easier path [to fighting climate change], and it’s not easy at all,” Canadell said. “In my view, it’s not even easier than carbon capture and storage, a technology we’re still developing. That’s because when you bring humans into landscapes and try managing these landscapes, this stuff becomes very complex.” Canadell is the co-author of a new study in Science that found, among other things, that the amount of land deemed suitable for newly planted and restored forests — an area roughly the size of India — quickly shrinks by as much as two-thirds when taking into account adverse impacts on biodiversity, food security and water resources.