Plastic and more plastic

Last night there was a documentary television programme about the Mediterranean. It dealt with an issue that I wasn't too aware of, the intensive  growing of vegetables for the European market.
Plastic greenhouses cover every square inch of 165 square miles of land around Almeria in Spain. The growth in greenhouses started in the late 1970s as a local response to an economic opportunity to provide vegetables for the European marketplace. The greenhouses are almost all hydroponic—growing vegetables in water, air and a chemical stew of fertiliser and pesticide. Due to the hot and extremely difficult working conditions inside the greenhouses, almost all of the human labour is imported from Africa.
The quantity of plastic involved is mind-boggling and if the programme is to be believed the old plastic  it is not disposed of in an environmentally friendly manner; far from it.
My photograph is a screen shot of a Google Earth image showing just a tiny portion of the sea of plastic.
What a nightmare we are creating for our descendants.