Traditionally, both manufacturing and engineering industries have been considered very "dirty" due to the inevitable production of a large amount of pollutants during their operations. For example, machine tools that spray lubricant or coolant may produce oil mist during drilling, grinding, milling, and turning operations; When using high-pressure coolant for grinding and cutting, high-speed CNC machine tools will produce oil fumes; Machines that do not use coolant during operation or processes such as dry welding, laser cutting, and sandblasting can produce dust and smoke containing manganese, lead, and other highly toxic elements.

For a long time, people have been concerned about outdoor air pollution, but have always overlooked the more serious harm of indoor air pollution. For example, when the Beijing Outdoor Air Quality Index (AQI) reaches 500 (or 0.5 milligrams of pollutants per meter) 3） At that time, the school will suspend classes. However, the pollution particles generated by modern machines used in global manufacturing factories can reach up to 100 milligrams per meter 3 The astonishing level is 200 times higher than the level of outdoor pollution commonly considered harmful.

These pollution particles in manufacturing and engineering workshops are very harmful - they not only cause acute or chronic illnesses to the human body, but also greatly reduce the motivation of employees working in such polluted environments, thereby reducing the productivity and profitability of enterprises. The manufacturing industry currently contributes ￡ 6.7 trillion in production value to the global economy, and the importance of having a good and clean working environment is worth pondering by practitioners throughout the industry.