In Africa, however, countries have fallen like dominoes to anti-G.M. campaigns. I am writing this at a biotechnology conference in Nairobi, where the government slapped a G.M.O. import ban in 2012 after activists brandished pictures of rats with tumors and claimed that G.M. foods caused cancer.
The origin of the scare was a French scientific paper that was later retracted by the journal in which it was originally published because of numerous flaws in methodology. Yet Kenyas ban remains, creating a food-trade bottleneck that will raise prices, worsening malnutrition and increasing poverty for millions.
In Uganda, the valuable banana crop is being devastated by a new disease called bacterial wilt, while the starchy cassava, a subsistence staple, has been hit by two deadly viruses. Biotech scientists have produced resistant varieties of both crops using genetic modification, but anti-G.M.O. groups have successfully prevented the Ugandan Parliament from passing a biosafety law necessary for their release.