YouTube, London Climate Camp 2009: Should we remake civilization based on these people's irrational fear of a harmless natural atmospheric gas?

London Climate Camp 2009 - Amelia Gregory clip#15

By the way, in this clip, the young folks seem to be enjoying a carefree, jolly summer camping adventure. How many of them are there because they really, truly believe that carbon dioxide is dangerous?

How many are old enough to remember the global cooling scare of the 1970s?