Question

why is it dangerous to leave plastic bags near fire

Answer 1

it is dangerous to leave plastic bags near fire because it can catch fire and release toxic gases in the environment

Answer 2

Answer:

It is dangerous to leave plastic bags near fire because it may catch fire easily and will release black color fume which is composed of toxic substance such as sulphur dioxide and Nitrogen dioxide.  

Explanation:

When these gases combines and reacts with oxygen present in the air, it leads to production of acids which is corrosive in nature.

Other reasons include, as plastic bag has high affinity towards the fire it burns and either leaves a sticky residue or it spreads the fire if other things are placed touching it.