Fact 1: Plastics are made from petroleum and produce toxic waste.

Fact 2: Toxic wastes can cause illness or death.

Given the two facts above, answer the question "What  can cause illness?" with the following options: 
- a nylon cord
 - burning coal
 - a plastic bag
 - heat or cold
 - a wool sweater
 - a leather purse
 - Pesticides
 - Sulfur dioxide


 

   a plastic bag      