Climate Sciences

Planting forests outside the tropics can sequester carbon and counteract global warming.

Planting trees in the zone between the tropics and the poles creates more clouds, which help to cool the planet.

Forests pull heat-trapping carbon dioxide out of the atmosphere. In tropical regions, the trees are so dense that the resulting cooling outweighs warming from the heat absorbed by their dark foliage.

But forests at higher latitudes, such as those in parts of Europe and North America, are sparser than forests in the tropics. Scientists have debated whether mid-latitude forests’ heat absorption outweighs the cooling from their CO2 absorption.

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