This was indeed one of the best episodes. I think my favorite bit is when Captain Planet appears. I love how they all say different things at the end. I know Captain Planet says his catch phrase. Another one said, "Only you can prevent forest fires". I have heard about sniffing glue before.
Never actually tried it. The animation is quite nice. Ingus kind of looks like Dick Cheney. Kind of an unfortunate design, I guess. I'd still listen to him over Dick Cheney, or Mike Spence for that matter.