Wearing a Mask Fails OSHA's Oxygen Workspace Requirement - 2 1/2 min vid
https://www.rumormillnews.com/cgi-bin/forum.cgi?read=149556
Test Shows Oxygen Levels Drop into the DANGER ZONE After 5 SECONDS
https://www.rumormillnews.com/cgi-bin/forum.cgi?read=149557
https://www.rumormillnews.com/cgi-bin/forum.cgi?read=149556
Test Shows Oxygen Levels Drop into the DANGER ZONE After 5 SECONDS
https://www.rumormillnews.com/cgi-bin/forum.cgi?read=149557