Genetically Modified Crop Circles

Our friend Nash in Mexico sends us this photo journal of her time spent making crop circles with Greenpeace:

For thousands of years, maize (corn) has been an essential food for the people of Mexico; it also plays an integral part in our culture and religion. Unfortunately,in recent years the maize has been tainted by GE varieties entering the country and being planted by unaware farmers. As a result,normally GE-free maize is showing signs of genetic contamination.
So the question mark conveys a simple message - contamination is happening, but nobody knows exactly where it is taking place, nor where it could lead for the wider environment. We did this protest in Oaxaca with the Cropcircle makers from the U.K., very nice guys.