Dear Alice,

I have lived in Japan for almost 30 years, and nothing says “summer in Japan” to me like the sight and smell of those once-ubiquitous green mosquito coils. I realized this year that I don’t see them as much as I used to and am wondering why. They always seemed to work, keeping the bugs at bay, although now that I say that, I realize I don’t know how or why mosquitoes don’t like them. I don’t even know what the heck the coils are made from. Can you give us the buzz?

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