Founded in 1969 Friends of the Earth is an international network of organizations devoted to advocate for environmental issues. EcoNexus was founded in February of 2000 as a research focused organization oriented to analyze new technologies and their potential negative impact on the environment.
These two groups have strongly voiced their stand against the creation and testing of OX513A (which is the name given to the genetically modified male Aedes aegypti mosquito) because of the unknown ramifications this experiment could have. These environmentalists sustain that introducing genetically engineered insects could have a series of events that nobody would be able to control.