olfactory pollution(Pollution produced by gaseous emissions in the atmosphere that, even in very small amounts, may cause injuries or a condition of general unease or sickness to persons living in the vicinity)
olive oil mill wastewater(Aqueous residue deriving from the process of oil extraction from olives; it is composed of the olive-combined water and of the water used in the extraction and washing processes. It also contains a certain percentage of mineral compounds and of organic substances that are only partially biodegradable)