What is it about silk worm protection against the insects which may damage the environment. Is silk a good environmentally friendly commodity of futuristic intent? And the pupa must be hard work for easy profit. We know that cotton is bad for the environment. But is silk so bad too? Health separate for the concerns of Man is a bad idea now. The middle east says so. http://cdn.intechopen.com/pdfs/3795...ment_with_special_reference_to_silk_worms.pdf