I am not an expert in air pollution control systems, or even an amateur. I don't even have an air filter installed in my house. I read some Wikipedia articles over the last couple of years, Googled, and watched some videos on YouTube (including "how-to" videos on the care and feeding of electronic air cleaners.) That doesn't make me an expert. That makes me some sort of approximation of a journalist — and if you've ever read those people writing about something you know about, you know how much they get wrong.