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A new study says that planting more trees in tropical rainforests could help slow global warming worldwide.The Our study shows that tropical forests are very eneficial to control the climate. Forests affect climate in three different ways: they absorb the greenhouse gas carbon dioxide from the atmosphere and help to keep the planet cool; they evaporate water to the atmosphere and increase cloudiness, which also helps keep the planet cool; and they are dark and absorb a lot of sunlight, warming the Earth. Climate change mitigation strategies that promote planting trees have taken only the first effect into account.

The study also concludes that by the year 2100, forests in mid and high latitudes will make some places up to 10 degrees Fahrenheit warmer than would have occurred if the forests did not exist.The darkening of the surface by new forest canopies in the high latitude regions allows absorption of more sunlight that helps to warm the surface. In fact, planting more trees in high latitudes could be counterproductive from a climate perspective. The study finds little or no climate benefit when trees are planted in temperate region.