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What Does it Take to Plant a Billion Hectares of Trees?

Planting a billion hectares of trees would require a massive undertaking. If we follow the paper’s (2) recommendations, reforesting an area the size of the United States and Canada combined (1 to 2 billion hectares) could take between one and two thousand years, assuming we plant a million hectares a year and that each hectare contains at least 50 to 100 trees to create an appropriate treetop canopy cover.



(2) Reference in the text to the following publication in Science: The global tree restoration potential


Tina Baumgartner Tina leads OpenAir's CDReality mission, and brings to this effort years of career experience in business development, writing and communications in the tech sector. She is based in the Bay Area.