US authorities have approved a plan to release more than 750 million genetically modified mosquitoes across the Florida Keys, despite objections from local residents. British-based firm Oxitec are behind the project that will test whether the altered mosquitoes can work as an alternative to pesticides to control the spread of diseases. The male mosquito, which is named OX5034, has been created to produce female offspring that die at larval stage, before they grow big enough to spread disease and bite. Female mosquitoes bite for blood while they mature their eggs, but males do not carry the diseases as they feed on nectar. The mosquitoes will be released in the Florida Keys in 2021, but will be expanded into Harris County, Texas, after the Environmental Protection Agency granted Oxitec's request for an experimental use permit. Jaydee Hanson, policy director for the International Centre for Technology Assessment and Centre for Food Safety ... criticized the decision. What could possibly go wrong? We don't know, because EPA unlawfully refused to seriously analyze environmental risks. Now without further review of the risks, the experiment can proceed," Mr Hanson [said]. Since the initial announcement of the project in May, more than 230,000 people have signed a petition against the proposal, which was supported by more than 30 local physicians. Local media reported that residents were unhappy to be treated as "guinea pigs" for the experiment.