New maps have revealed the best “win-win” opportunities across the world to regrow forests and tackle the climate crisis, without harming people or wildlife. The places range from the eastern US and western Canada, to Brazil and Columbia, and across Europe. If reforested, this would remove 2.2bn tonnes of carbon dioxide a year, about the same as all the nations in the European Union. Previous maps have suggested much larger areas but were criticised for including important ecosystems. …The result was a map showing 195 million hectares of reforestation opportunity, an area equivalent to the size of Mexico but up to 90% smaller than previous maps. …“Reforestation is not a substitute for cutting fossil fuel emissions, but even if we were to drive down emissions tomorrow, we still need to remove excess CO2,” said Dr Susan Cook-Patton, at The Nature Conservancy and author of the new study, published in the journal Nature Communications.