Scientists warmed Minnesota forest trees by 3.4°C for years expecting respiration to surge 23%; the trees adapted and erased nearly 80% of that increase

• The open-air study was designed to mimic future warming while maintaining natural outdoor conditions.
• Researchers established plots in both open and closed-canopy forest environments and planted seedlings representing 11 tree species.
• In a Minnesota forest, researchers turned up the heat, not for days or weeks, but for years.