On Fri, 16 May 2014 07:23:47 -0700, Bob F wrote:

Wood, cellulose, cotton, silk, wool, etc., were bad decades ago,
but they were nowhere near as toxic as the chemically-manufactured
materials of today.

This article lumps all the toxic gases and particulates plus
the irritant gases into a single word "smoke", but it also
lists at what temperature some of these synthetics melt at:
http://www.survival-expert.com/aircrash.html

Nylon melts at 265°C (510°F) and burns at 485°C (905°F).
Polyester melts at 254°C (490°F) and burns at 488°C (910°F).