They were actually not spoof books but the real thing that with hindsight were grimly amusing.
Given the impact of Blue Planet showing how plastics have polluted our oceans and caused umtold damage to our marine ecosystems The one that caught my eye was the Ladybird book of ' Plastics' published in 1972. I laughed out loud when I saw the page on 'before plastics and they had a picture of stone age cave dwellers, as if the whole of history was completely primitive before the age
The whole book is completely uncritical as you would expect from an educational book aimed at children just before the dawn of the Green Movement in the UK and probably written by the industry itself. What really did strike me was what innocent times those were. Our actions had no perceived consequences. We don't have that excuse anymore.