By far the biggest BS in this BS! episode is the FUD surrounding global warming; Penn shouts: "WE'RE NOT SURE YET" at the top of his voice. To help them with this is Jerry Taylor of the Cato Institute, who trots out the
ice age fallacy. In 2003, when this episode aired, there was already abundant data available on global warming to be reasonably sure that it's real, and caused by human activity. At the same time, Taylor handwaves any potential harmful impact on the basis that we're doing fine so far.
(...)
A refutation is offered in the form of
Bjørn Lomborg, also not a scientist, whose work has been excoriated by numerous actual scientists such as E.O. Wilson and Stephen Schneider[citation needed] and not just hippies and eco-nuts, and a 20-something old spokesperson at an environmentalist rally who's asked critical questions (but doesn't really have an answer ready at any of them). Patrick Moore,Wikipedia the Greenpeace-founder-turned-critic, provides commentary on most issues throughout the episode.
In the episodes that focus on woo, Penn often points out people's lack of credentials and counters woomeisters' nonsense with actual scientists, but here, only non-scientists represent the environmentalist view. There is very little actual content.