Nuclear Assault was the sort of band that you could point to when your parents were convinced that all heavy metal bands promoted Satanism. Nuclear Assault couldn't have been a better influence on the youth of America. Long before Al Gore and An inconvenient truth, Nuclear Assault was spreading a message of environmental awareness. One only needs to look at the cover of their albums (Handle with care (1989) in particular) to get a sense of their message:
The video for "Critical Mass," the big single from that album, is a variation on the standard heavy metal performance clip (along with a gratuitous appearance by Jessica Hahn). In the video, the band stands in front of a couple of oil wells. Interspersed throughout are clips of traffic, landfills, and the like. Of particular interest here is that the band actually presents all of the lyrics to the song along the bottom of the screen using an adaptation of the classic Mitch Miller follow-the-bouncing-dot technique.* The band clearly felt that the message they were presenting was important and not to be missed in spite of John Connely's less than perfect diction.
The video also begins with some bumper material from the old Headbanger's Ball starring Riki Rachtman, and he introduces the video. Before he was a VJ (or a DJ), Rachtman was the proprietor of the Cathouse, one of the premier venues for heavy metal in Hollywood where Guns 'n' Roses got their start.
*In this case, the bouncing dot was Nuclear Assault's mascot, a one-eyed mutant "Have a nice day" smiley face.