Transperth advert calls CO2 "poisonous"

This is the level or ignorance we have reached, where Transperth, the government department in Western Australia responsible for public transport, broadcasts a television advert that refers to “poisonous CO2”. In the few hundred parts per million it is in the atmosphere, it is completely harmless, and (cue junior school biology lesson) is essential for life on earth. But hey, don’t let the facts get in the way of a scary story.

Idiotic.