American traditional industries are mainly concentrated in the Northeast Industrial Zone, which has been declining in recent years. American industries have gradually developed from the Northeast to t

American traditional industries are mainly concentrated in the Northeast Industrial Zone, which has been declining in recent years. American industries have gradually developed from the Northeast to the Ministry of () because of (). South and west

On the one hand, traditional industries are facing fierce competition from emerging international industrial countries such as Japan, western Europe and some developing countries, and are in a state of decline, which makes some departments in basic industries such as steel, automobiles, certain chemicals and machinery manufacturing stagnate. On the other hand, in California and other States along the western Pacific, some emerging military-related departments, such as aircraft, missiles, electronics and atomic energy, have made great progress, forming a high-tech electronic industrial zone centered on Los Angeles. The emerging industries with high-tech industry as the core and called "Silicon Valley" are showing a vigorous and upward trend. Due to the single industrial structure, serious environmental pollution, traffic congestion, tax increase, high land price and high cost of living, the industries in the south and west, known as the "sunshine zone", have developed rapidly, and the development speed is much faster than that in the northeast, so they are called "sunset industries".