Good point, there is an acceptance that as long as a device is rechargeable it is 'green', although it may have a net power consumption that would be unacceptable if powered from a primary battery. Transferring these devices' smart power-saving tricks to battery-powered devices might be something we will see, but we need a new, greener primary cell first.
Some fuel cells look interesting there, some claiming to be recyclable.
Professionally, I am concerned about the EMI background noise floor rising at a measurable rate, as you point out.
What are the engineering and design challenges in creating successful IoT devices? These devices are usually small, resource-constrained electronics designed to sense, collect, send, and/or interpret data. Some of the devices need to be smart enough to act upon data in real time, 24/7. Are the design challenges the same as with embedded systems, but with a little developer- and IT-skills added in? What do engineers need to know? Rick Merritt talks with two experts about the tools and best options for designing IoT devices in 2016. Specifically the guests will discuss sensors, security, and lessons from IoT deployments.