Article doesn't actually answer the question? Certainly interesting information about the topic and efficacy, but it doesn't really explain how the current situation came about.
Why is my neighbor driving around on a donut? I could write 3000 words on the history of tires, the assorted trade offs of trunk storage vs spare diameter, the geographical distribution of potholes, etc., but none of that explains why the donut is there.
Why is my neighbor driving around on a donut? I could write 3000 words on the history of tires, the assorted trade offs of trunk storage vs spare diameter, the geographical distribution of potholes, etc., but none of that explains why the donut is there.