Plastics - EduqasSocial and ecological issues

Most polymers are manufactured and are designed by chemical engineers. Most are made using non-renewable crude oil. Difficulties around disposal mean there is a drive to reduce the use of plastics.

Part ofDesign and TechnologyIn-depth technical principles

Social and ecological issues

When considering the ecological and social implications of using , it is likely that the polymer is . Some polymers are plant-based, but most are derived from , which cannot be grown and is a - there is only a certain amount within the Earth’s . As a tremendous amount of energy is used to convert crude oil to a polymer, it is important to consider other materials or to plastics already available.

In order to reduce environmental impact, an analysis is carried out to review different stages of the material or product’s life cycle. There are two different cycles:

  • linear - ending with disposal, adding waste to landfill
  • circular - continuous and incorporates recycling to ensure materials and products are used over and over again

Life cycle analysis needs to be considered by the designer, the and the to reduce negative impact on the environment.

A comparison of a circular life cycle (make, use and recycle) to a linear one (take, make and dispose).
Figure caption,
Life cycle analysis

Plastic identification codes

Plastic products and packaging have codes on them to identify the type of plastic they are made from, as not all plastics are recyclable.

The seven different plastic identification codes, shown as numbers with three recycling arrows around them and labelled with the relevant plastics for that code.
Figure caption,
Plastic identification codes