27.03.2025 - In the past, intact forests absorbed 7.8 billion tonnes of CO₂ annually – about a fifth of all human emissions – but their carbon storage is increasingly at risk from climate change and human activities such as deforestation. A new study from the Potsdam Institute for Climate Impact Research (PIK) shows that failing to account for the potentially decreasing ability of forests to absorb CO₂ could make reaching the Paris agreement targets significantly harder, if not impossible, and much more costly.