An Inconvenient Truth

[Occhidiangela]

One of the things addressed in the film is that there is a yearly CO2 level cycle, easily visible on the graph as a zig-zag. What causes this cycle? Turns out that the Northern Hemisphere is better (so far) at mitigating CO2 buildup, because it has much more arable land mass than the Southern Hemisphere. It has a lot more vegetation (trees), and it reduces the CO2 levels each year as the sun provides more heat to the Northern Hemisphere (during northern summer). During northern winter, the sun gives more heat to the Southern hemisphere, which has less landmass, so less vegetation, so less CO2 mitigation.

The zig-zag, to me, shows that human activity is DEFINITELY affecting CO2 levels, through deforestation alone.

Which makes the Brazilian Rain Forest shrinkage a bit more troubling, given hemispheric imbalance balance. I am going to email my old weather expert buddy.

Occhi