Mosquito-repellent billboards installed in Bangkok
Unique billboards designed by the Kayari insect repellent brand have appeared in Thailand. The new advertising structures use 3 methods to repel mosquitoes at once.
The first method is a bright yellow color, which, according to research, effectively repels insects. Secondly, the billboards emit sound at a frequency of 15 kHz, which also helps to deter bloodsuckers. Finally, they spray pyrethrum e
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