A talk by Prof. Perry Samson
Conspiracy theorists (both left and right) often concoct theories about the environment that fester in the world of social media unfettered by scientific evidence. This presentation begins with a critical review of “chemtrails”, the claim that the government is engaged in activities to manipulate atmospheric processes to meet sinister designs. Embodied in this claim is the hypothesis that the atmosphere is being seeded to create clouds, precipitation and even hurricanes.
While chemtrails claims are preposterous, if not laughable, the reality is that humans can and do modify weather and climate. This presentation discusses the reality that techniques are being studied that could offset warming due to increasing greenhouse gas concentrations through geoengineering, the alteration of natural processes to either reduce incoming solar radiation or increase the removal of greenhouse gases from the atmosphere.
A video from this talk appears below: