“What would the world be like without Hula-hoops and Tupperware? Discovered in 1933, polyethylene was first utilized as an insulator in British radar cables. It is basically a long chain of two hydrogen atoms on either side of a carbon atom. Two types, high density and low density, are manufactured as packaging and containers and for more critical applications such as water pipes, insulation, and water vapor barriers used in construction.”
(National Geographic Special Publication “How Things Work”. Adapted.)
The text does NOT mention polyethylene use in
