Compostible plastic

I received a present the other day, that had been bought at the Royal Horticultural Society in Britain, packaged in a plastic bag bearing this information ‘Please compost this bag. This bag is made with G.M.-free renewable corn starch. Put your kitchen waste inside, deposit it with the bag in your compost heap and it will break down completely.’
What a breakthrough! We live in a land of mielies – the source of corn starch – is there a hope that something of this kind might be undertaken here? Maybe it is a solution to the curse of the ubiquitous plastic bag.
Angela Smitherman, Pinelands