As per experts opinion, that appeared in an article, the tower building outside had 150 mm thick insulation boards containing polyisocyanurate with aluminum foil clad. These boards released dangerous hydrogen cyanide gas upon exposure to fire.
Many household items, vehicles, furniture, etc use a range of products that are made having chemical compounds and these materials release dangerous toxic gases upon exposure to heat.
Still we use, attracted by colours, price, etc.
