@dpalash124, if we destroy the entire mosquitoes in the world, we actually don't know what to expect because it would affect the ecosystem, in the sense, that birds feed on mosquitoes, frogs feed on their eggs, and many more, the creatures that feed on mosquitoes might to turn to us for food, hahahaha, imagine frog sucking or should I say licking blood, hahaha. All I'm trying to say we won't know what to expect and secondly any method they use must be a global stuff, most likely gas, and that may affect us, humans or other creatures in some way. If u are watching Zoo a seasonal movie you would understand more on the risk of global gas release.

Thanks a lot for coming around and sharing your lovely comment @dpalash124