A question without an answer....

[Stoo]

its like, why does the 1 line on my dash go up and the expensive line go down when i boot it in 2nd?

huh?

[[exit]]

I think that they (tyres) all end up in layers on the road, and end up as sand. Rubber is silicone based, like glass. Well i think that the rubber shreds, and ends up where it starts... on beaches.

[dkmech]

Surelly rubber is based on oil products, not silicon?

[Auran]

Even worse - roads wear down over time so where does that go?

[Lee H]

The rubber is turned into small particles that are then airbourne and blown about with the wind. Hence this could be a reason why respitory problems such as asthma, and others are on the increase?

[[GSV]Trig]

Good point that WildMonkeh...