Google’s parent company Alphabet, through its biotechnology firm Verily, has applied for permission to release millions of laboratory-bred mosquitoes in Florida and California. The aim is to reduce populations of disease-carrying mosquitoes, thereby limiting the spread of West Nile virus and other mosquito-borne diseases.

The project, called Debug, is based on infecting male mosquitoes with the Wolbachia bacteria before releasing them into the wild. When these males mate with wild females, the eggs do not develop, causing the population to gradually decline. Since only male mosquitoes are used, the method does not result in more mosquito bites for humans, as male mosquitoes do not feed on blood or transmit diseases.

Media reports have stated that Google intends to release 32 million mosquitoes. However, application documents cited by several media outlets describe a plan where up to 16 million mosquitoes per year may be released in each state over two years. This means the total number could potentially reach 64 million mosquitoes during the entire trial period. The difference is due to some reports referring to the annual scale while others sum up the entire project period.

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Verily has worked with the technology for several years and uses automated systems, robotics, and artificial intelligence to breed, sort, and distribute the mosquitoes. The company states that the method can serve as an alternative to traditional pesticides and that earlier trials have shown promising results.

Trials in Fresno, California reported significant reductions in the targeted mosquito population, and similar Wolbachia-based programs in Singapore have been linked to both fewer mosquitoes and reduced spread of dengue fever.

Sparking Debate

The proposal has sparked debate. Proponents highlight the technology as an environmentally friendly alternative to chemical control, while critics call for more research into the long-term effects that large-scale releases might have on local ecosystems.

The application is currently under review by the US Environmental Protection Agency (EPA). The agency is now accepting comments from the public before deciding whether the project will be allowed to proceed.

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