Have you heard of a major COPD risk factor other than smoking?

Have you heard of a major COPD risk factor other than smoking? 

https://video.wixstatic.com/video/f07503_7c7eecfd301744c493ba0ceec4ac26c0/720p/mp4/file.mp4

source:

https://jamanetwork.com/journals/jama/fullarticle/2766866

doi:10.1001/jama.2020.6918