Many mentions of factoring weight in this thread, I believe should also consider size of vehicle, how much space the vehicle occupies on the road. Some combination of miles, weight and size.
For those asking how tracked, a prior trial used a device plugged into OBD port like some insurance companies use. That trial generated monthly billing for miles driven in state. Tracked not just miles driven, but also where the vehicle was driven. This is done so miles driven out of state are excluded from the road charge. Not perfect as miles driven inside national park (Federal not state maintained) were included in the billing. Hopefully that big was fixed.
I like concept but the very real privacy issues, uh, not so much
Not previous poster. A helpful statistic would be recorded medical incidents. Treatment sought for burns from microwaved superheated water could be used as an indicator of how much of a danger using a microwave oven to boil water is.
Full disclosure, electric kettle user, bag before water.
I've had an iHome alarm clock at my bedside since 2005. It has a dock for an iPod and a utility plug for other audio devices. Many other brands of alarm clock have utility plugs for audio input as well. Phone different? Yes. Superior? No.
Most pre-Columbian societies in the America's were sustainable.