noun
synthetic chemical industry
Refers to the industrial sector that produces chemicals through synthetic processes, as opposed to natural extraction.
合成化学工業は、プラスチックや合成繊維を製造する。
The synthetic chemical industry manufactures plastics and synthetic fibers.
化学工業 is the broader chemical industry, while 合成化学工業 specifically refers to the synthetic chemical sector.
Compound of 合成 (synthesis), 化学 (chemistry), and 工業 (industry).