> In many ways, this scenario is even gloomier than BAU, and many say that it predicts the dire outcome of allowing climate change to go unchecked. But if they are using the same World3 model, created in 1972, with a single variable representing "pollution", then surely it's just a coincidence if the effects of climate change end up modelled correctly. The climate is a non-linear system, and there certainly weren't g…
I thought that "pollution" chart showing it dropping off sharply in all scenarios (due either to clean technology or societal collapse) were unlikely. If you are counting CO2 as pollution (and you should) then it's very hard to get it back out of the air, especially in a short timeframe. So in all cases the pollution line ends up in a steady state at roughly wherever society either weaned itself from fossil fuels or…
There is a caveat. They only consider CO2 from specific sources to be pollution, so we can't just blanket call it pollution. For example, the CO2 I exhale would not be considered pollution, but if it's coming from fossil fuels or even burning trees, then it is. I'm not sure how they handle the natural burning of tree, like wildfires though.