FYI, the ozone emissions we're talking about are separate from the Ozone Layer, which is where the "holes" are. Ozone in the upper atmosphere is good, because i

FYI, the ozone emissions we're talking about are separate from the Ozone Layer, which is where the "holes" are. Ozone in the upper atmosphere is good, because it blocks UV light. Ozone in the lower atmosphere (i.e. the air we all breathe) is bad, because it's harmful to humans and animals, especially to respiration. Ozone has a ton of precursor chemicals (collectively called Volatile Organic Compounds) which are roughly any organic carbon compound more complicated than ethane (so most things with 3+ carbon atoms), which the oil & gas industry in particular struggles to avoid emitting.