These do look great however please read the following:
Studies of construction fires point to another major hazard of playa burning. PVC -- the playa construction material of choice -- is highly dangerous to both personal health and the environment when burned. PVC is one of the worst offenders when it comes to toxic substances. PVC can emit highly corrosive and toxic hydrogen chloride when burned. It is also is a source of dioxin and phosgene gas when burned at temperatures below complete combustion. Coincidentally, phosgene, an odorless gas that can damage the lungs, is one of the substances used in chemical warfare. Samples of soot taken from fires in PVC-containing buildings that have burned have been found to contain dioxins in very high concentrations. The soot, however, represents only a small part of the problem: more than 90 of the dioxins produced in a structural fire are found in the gaseous phase and escape into the atmosphere.
For these reasons, PVC should never be burned. Please make sure anything to be burned is PVC-free.





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