When the deniers start hauling out the Big Oil charts and studies, I just ask them this simple question: Are they saying that over 230 years of global deforestation and urbanization has NO EFFECT on the global climate? If they say yes, then they've obviously never experienced or heard of "smog" in California.
What 'global deforestation'??
No effect.
Climate cannot change.
There is no such thing as a 'global climate'.
Urban areas comprise less than 1% of the Earth's surface.
BTW, did you know that the thing that saved the whales was Big Oil? We don't need whales for oil lamps anymore!
Smog is caused by a combination of:
* ozone
* gasoline vapors (unburned)
* the presence of nitric oxide
Making ozone is easy. All you have to do is take oxygen and shove energy into it. Electricity, fire, lightning, sunlight, all produce ozone.
Gasoline vapors form from any liquid gasoline. That's why cars have sealed fuel systems now.
Nitric oxide can be generated in an internal combustion engine cylinder that is running very hot. This can be alleviated by reducing the peak temperature of the cylinder using a simply bit of plumbing and a valve known as the EGR system.
So Los Angeles no longer gets smog. They still DO get marine fog mixed with dust (it's a desert) and idiots like you think it's smog.
I remember the days of smog in L.A. when it was so thick you couldn't see the airport on a clear day. You had to conduct an instrument approach.