Innovative advertising that protects against mosquitoes! On the streets of Thailand

For the first time, billboards not only advertise a product but also show it in action, so to speak. The billboards work in three ways: - they emit a yellow light that repels mosquitoes, - ultrasound, - and also contain a herbal extract of pyrethrum. We don't know how effective it is, but I think it's pretty cool #outdoor #chemistry #insects