Upload date
All time
Last hour
Today
This week
This month
This year
Type
All
Video
Channel
Playlist
Movie
Duration
Short (< 4 minutes)
Medium (4-20 minutes)
Long (> 20 minutes)
Sort by
Relevance
Rating
View count
Features
HD
Subtitles/CC
Creative Commons
3D
Live
4K
360°
VR180
HDR
1,029,134 results
Decades ago, Kris Hansen showed 3M that its PFAS chemicals were in people's bodies. Her bosses halted her work. As the EPA ...
14,530 views
3 weeks ago
Learn about the designing safer chemicals - green chemistry principle 2 as part of WELS (Waterpedia Environmental Learning ...
1,293 views
7 years ago