cwingrav

libertyforall said:

It is going to need something more than just UWB to be a useful tag for locating, it would need at least Bluetooth to make it locatable from further by various devices.  UWB range is pretty small.  

UWB goes through walls and is measured on the order of meters. It's the tech used in industrial RTLS systems. More than capable for indoor locating. Larger spaces (multiple shops or different departments in a store) could easily be instrumented with multiple emitters/sensors.

buckkalu said:

Then there is the devastating effect the number of birds, bats and other insects killed by the blades.

Greatly over-hyped. I feel for the animals hit, but they're better off in a world with clean energy given the ACTUAL low numbers.

The number of birds killed by turbines is fairly insignificant to existing sources:

• windmills          (10k-500k)
• cars                  (60,000k-80,000k)
  
• pesticides        (~70,000k)
• power lines      (130,000k-174,000k)
• other sources: cars (hundreds of million, windows, coms towers, etc) 

Here's a link which provides references as well to its sources: https://science.howstuffworks.com/environmental/green-science/wind-turbine-kill-birds.htm