A report, Voices from the South, debunks six myths about GMO's.

Example--the myth that GMO's are necessary to feed the third world:
The world today produces more food per inhabitant than ever before. In fact, over the past 35 years, per capita food production has outstripped population growth by 15%. The real causes of hunger are poverty, inequality and lack of access. Too many people are too poor to buy the food that is available (but
often poorly distributed) or lack the land and resources to grow it themselves.