Three fiddy
Had an interesting TOK moment in class the other day. I was finishing off global warming with my HL class and showed them a graph on the SMARTboard that had copied from somewhere when preparing material for my book. The graph is quite a well known one showing the rise of CO2 concentration in ppm against date for the past 40 or so years. One of the students pointed out that it couldn't be correct because according to the graph we had already gone past the point of no return which is supposed to be 350. The class knew this fact was because we had a visit last year by Bill McKibben who started the 350 movement. Anyway I also remembered the number 350 and realised that something must be wrong with the graph.
NO.
Something was wrong with our understanding of 350. I looked it up after class and was reminded that 350 is the concentration we must get back to as soon as possible to avoid runaway climate change. Daunting.
350 (Three fiddy) is also a famous line from South Park but that's another story about the lochness monster.