Article: The hay fever man: photocatalysts do more than clean windows and toilets.

Like this writer's own 9-year old daughter, many kids in Japan suffer from hay fever or related allergies such as asthma. Every spring and sometimes in the fall as well, their eyes go red and itchy, their mucous membranes swell up. Each day starts with a sore throat and runny nose, not to mention, on really bad days, the pounding headaches. As parents, we can't help feeling slightly helpless when hay fever hits ("kafunsho" in Japanese), and dream of finding a solution to the problem.

Tokyo--the developed world's allergy capital

Japan, and Tokyo in particular, has one of the highest levels of hay fever and related allergy incidences in the world. As the ...

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