I once worked a short stint at a company here in Toronto that was making weather probes for an airport in Japan. I did calibration, testing, and sealing little holes in the styrofoam enclosures. These probes had sensors, battery, microcontroller, and a radio. We made many thousands of these things that would be sent up on weather balloons and would eventually be e-waste landing in the Pacific. The whole time, as I saw boxes of these probes stacking up I was thinking about this constant stream of e-waste. It blew my mind that these sophisticated little devices were single use electronics, and I kept thinking that there really must be a better way to do these measurements.