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At the risk of sounding like a concern troll, I wish people were more thoughtful with tree planting campaigns. Rich ecosystems (peatlands, grasslands, savannas) have been damaged by attempts to introduce trees where they don't really belong. Surprisingly, this can cause a net decrease in carbon capture! And monoculture forests support relatively little biodiversity even though they look so green.

Sometimes planting more trees is the right answer, and we should absolutely do it. But often it feels like planting trees is a cheap way to score some green points without actually establishing healthy, sustainable ecosystems.