Fears raised that smoke alarms dumped in Berkshire landfills could cause cancer - Berkshire Live
Smoke Alarm and Detector FAQ Adelaide
Smoke alarms emit about 10 milirems of radiation per year but are worth it to save your life from fires. Is there any new technology that's as cheap but safer? - Quora
80 µCi Americium-241 Sources Inside Old Pyrotronics F3/5A Smoke Detectors – diy Physics Blog