One thing that stands out for me in this article is Figure 3: Europe shows a significant mortality of adults 20-65 drop from 2005 to 2018. What has improved the

One thing that stands out for me in this article is Figure 3: Europe shows a significant mortality of adults 20-65 drop from 2005 to 2018. What has improved there? Improvements in cancer treatments seem like it would mostly show up in the 65+ range. Is it mostly lower air pollution + fewer traffic accidents?