There's no real credible evidence that car exhausts alone cause global warming.
Since methane is one of the main culprits of greenhouse gas emmisions, livestock (cows, sheep, pigs, horses etc) are responsible for around 18% of emmissions and all transportation around 13.5% (that's a scientific fact) then we should kill all cows to stop them farting rather than take cars of the roads. And since humans breathe and fart more than cows and live longer, humans contribution is even higher than a cows.
So to blame car exhausts emissions on global warming that causes skin cancer is ridiculous. What causes skin cancer is idiots who stay out in the sun too long and don't wear enough protection. This isn't a recent phenomenon that only started since the invention of the motorcar but something that's been going on since the dawn of time.
I could prattle on about the electromagnetic field and how that's changing, which inturn is affecting climate change reducing our protection against harmful suns rays, but I won't.
Yes cars stink and might be bad for the environment but so is a quarter pounder from McDonalds and I haven't heard anyone say a McDonalds causes skin cancer.
Pud
