Take for example the important principle of "management at source." Many manufacturing processes include "coating" (for example spray-painting colors on the shells of mobile phones or applying photoresist or liquid crystals to glass substrates), and this process generates many "volatile organic compounds" (VOCs) which ultimately have to be sent to a wastewater treatment plant for final disposal.
以「源頭管理」為例，許多工廠製程均包含「塗佈」（如手機機殼表面的噴塗、玻璃基板塗光阻或液晶），會產生各種揮發性有機物質（VOCs），通常是將 VOCs「水洗」後送廢水廠處理。