European forests have been studied using Landsat data to track changes in tree canopy height from 2001 to 2021. By combining satellite data with lidar measurements, researchers found that tree canopy extent in Europe increased by nearly 1% over the past two decades, with the largest growth in Eastern Europe, Southern Europe, and the British Isles. However, after 2016, tree canopy extent started to decline. Fennoscandia saw the biggest decrease in tree canopy extent, while tall tree canopy forests (over 15 meters) decreased by 3% overall. This decline in tree canopy height suggests a reduction in forest carbon storage capacity in Europe, likely due to increased timber harvesting and natural disturbances.