Naturally-regenerating forests are often ignored by policymakers working to curb climate change even though they hold an untapped potential to rapidly absorb planet-warming carbon from the atmosphere, scientists found in a research paper published Tuesday. These so-called secondary forests, which have regenerated themselves after being razed, often for agriculture, can help bring the world closer to the net-zero emissions target needed to slow global warming, the research published in the journal shows. That is because these young forests, which are made of trees between two and four decades old, can remove carbon from the atmosphere up to eight times faster per hectare than forests that were just planted, they found. It comes as companies worldwide are raising millions of dollars to regrow forests from scratch to generate carbon credits they can sell to polluting industries seeking to offset their greenhouse gas emissions.