Planting billions of trees across the world is by far the cheapest and most efficient way to tackle the climate crisis. So states a Guardian article, citing a new analysis published in the journal Science. The author explains:

As trees grow, they absorb and store the carbon dioxide emissions that are driving global heating. New research estimates that a worldwide planting programme could remove two-thirds of all the emissions that have been pumped into the atmosphere by human activities, a figure the scientists describe as “mind-blowing”.

For skeptics who reject the global warming thesis, reforestation also addresses the critical problems of mass species extinction and environmental pollution, which are well-documented. A 2012 study from the University of Michigan found that loss of biodiversity impacts ecosystems as much as does climate change and pollution. Forests shelter plant and animal life in their diverse forms, and trees remove air pollution by the interception of particulate matter on plant surfaces and the absorption of gaseous pollutants through the leaves.