This is an engineering challenge that involves the responsible use of materials and innovations that will ensure that the materials can be recycled and reused. The challenge is to develop a product, solution that addresses the resource challenge, or a system to recover and reuse materials.
You might start by considering the questions, what waste streams you are familiar with or can see impacting in your local community, what scientific knowledge could tackle the problem, and how to meet the requirements of easy to use, economical affordable, safe and environmental friendly, etc.
Your solution should be consistent with the theme of World Engineering Day 2022
Build Back Wiser–Engineering the Future.