China's rare earth industry is facing internal and external difficulties: domestic, excessive consumption of resources, serious environmental pollution, illegal mining has been repeatedly banned, and a large number of rare earths have been exported and smuggled in disguise; foreign countries, the United States, Europe, and Japan have continued to export rare earth The pressure on China and the ultra-intensive mining for more than half a century have caused China's rare earth resources reserves and guaranteed years to continue to decline. Some experts pointed out that compared with the amount of human resources, China is now a country with rare earth shortages, but Industrialization has not been completed, and a larger amount of rare earth will be needed in the future. What is the main message of this text? ["China's rare earth resources are scarce and per capita resources are low due to over-intensity mining.", 'China has paid a heavy environmental price for the mining of rare earths.', 'Need to coordinate management of rare earth development, production and export.', 'Domestic and foreign factors cause various difficulties such as disordered development of the rare earth industry.']