The myth created around plastic recycling has been one of simplicity. We look for the familiar triangle arrows, then pop the waste in the recycling bin so it can be reused.

But the true purpose of those triangles has been misunderstood by the general public ever since their invention in the 1980s.

These triangles were actually created by the plastics industry and, according to a report provided to them in July 1993, were creating "unrealistic expectations" about what could be recycled. But they decided to keep using the codes.