Researchers have discovered that trees can play a significant role in reducing atmospheric methane, a potent greenhouse gas. Methane, while less abundant than carbon dioxide, has a much stronger effect on warming the Earth. This new study, published in the journal Nature, reveals that certain trees can absorb methane through their woody surfaces, especially at heights above 2 meters from the ground.

The study examined trees in various types of forests: tropical, temperate, and boreal. The researchers found that trees in these different environments can act as a "sink" for methane, meaning they absorb more methane than they emit. This process is primarily driven by microbes living on the tree surfaces that consume methane.

To determine the global impact of this discovery, the scientists used advanced technology, including terrestrial laser scanning, to estimate the total surface area of trees worldwide. They calculated that trees might be responsible for absorbing between 24.6 to 49.9 teragrams of methane annually. This is a substantial amount, considering the current imbalance in the global methane budget, where emissions exceed absorption.

This finding suggests that protecting and restoring forests could have greater climate benefits than previously thought. Trees not only absorb carbon dioxide but also methane, adding an extra layer of climate mitigation. This research underscores the importance of forests in fighting climate change and highlights the need for more studies to fully understand the various ways trees impact our environment.

The researchers conclude that forests, especially tropical and temperate ones, are even more valuable for climate protection. By absorbing methane, trees help reduce the overall greenhouse gas levels in the atmosphere, making forest conservation and reforestation crucial strategies in our efforts to combat global warming.