Agricultural mulch films, used to cover soil to suppress weeds and conserve moisture, can be manufactured from polylactic acid (PLA) instead of traditional low-density poly(ethene) (LDPE).
The raw material for PLA is corn starch from crops, whereas the raw material for LDPE is crude oil.
Explain one environmental advantage, other than cost, of using PLA rather than LDPE to manufacture agricultural mulch films.
Practise Edexcel GCSE Chemistry Polymers with exam-style questions for Foundation and Higher tier. 100 questions, matched to the Edexcel GCSE Chemistry (1CH0) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.