MTBE, Ozone
And, we were also talking about ozone. We'll get into the effects of ozone and ozone depletion up high (stratospheric or "good" ozone) after break, but I wanted to give you guys the fact sheet on low-level or "bad" ozone. Oxygen is super-powerful stuff, and O3 is highly reactive even by oxygen standards. We use it to kill organisms to purify our public drinking water. Here is the fact sheet on the effects of high- and low-level ozone from the EPA.

