On the contrary, the cloud is mostly CO2 and soot, trace phosgene (breaks down faster than vinyl chloride), and HCL (reacts with everything; is probably fully a

On the contrary, the cloud is mostly CO2 and soot, trace phosgene (breaks down faster than vinyl chloride), and HCL (reacts with everything; is probably fully absorbed into the environment right now). There is a recommendation to clean the soot and vacuum, but otherwise no major alerts regarding the cloud of burn products that I've seen. They burned it on purpose to turn the vinyl chloride and other chemicals on the train into less harmful byproducts.