Based on combined data from the China Patent Database, China Industrial Enterprise Database, and China Customs Import and Export Database for the period 2004–2010, this study investigates the impact of heterogeneous environmental regulations on the export technological sophistication of manufacturing enterprises. Given deepening international market segmentation of production and the increasing proportion of intermediate trade, and compared with the traditional method based on exports, the export technological sophistication calculated here, based on value-added, is closer to the true level. Since there has been no in-depth comparative study on the relationship between heterogeneous environmental regulation and export technological sophistication, this study fills the gap. The results show that all three regulation types bear a U-shaped impact on export technological sophistication. Command-control regulation exhibits a restraining effect on mixed trade, eastern, and foreign-funded enterprises. Market-incentive regulation promotes processing and mixed trade enterprises as well as domestic and foreign-funded enterprises. Voluntary-participation regulation promotes all enterprises with different trade patterns and ownership. The mechanism analysis shows that command-control and market-participation environmental regulations affect export technological sophistication through the green invention and green utility innovation channels, while, additionally, market-incentive environmental regulation affects export technological sophistication through the green design innovation channel. Considering the environmental governance issues, the policy implications for enhancing the entire industrial chain and enterprises’ export competitiveness are clear. Due to the unclear functions and powers of competent departments and a rigid threshold, command-control regulation is not conducive to cleaner production technology and the promotion of enterprises’ export competitiveness; it should thus be discouraged. Although both market-incentive and voluntary-participation regulations have promoted cleaner production technology and enterprises’ competitiveness significantly, the environmental tax system requires continuous improvement. The government should continue to raise public involvement in environmental protection to enrich the channels and forms of environmental management.

Small and medium-sized enterprises (SMEs) are vital drivers of China’s economy. As in any other country, SMEs in Chinaare exceptionally exposed to the devastating effects of the COVID-19 outbreak. The aim of the paper is to assess the impact of the pandemic on SMEs in China and study the effectiveness of the government’s support for SMEs through the crisis. The methodologies applied by the authors included the historical and logical method, the method of the rising from the abstract to the concrete, synthesis, comparative factor analysis, grouping and graphical methods, as well as a systematic and statistical approach. The authors investigate the main policies and initiatives launched in support of smaller businesses and implemented by the People’s Bank of China, the Ministry of Finance, the National Development and Reform Commission, the Ministry of Industry and Information Technology, as well as by the two national regulatory authorities –– China Banking and Insurance Regulatory Commission and China Securities Regulatory Commission. In this paper the authors analyze the direct and indirect support available to SMEs through financial institutions. The study leads to the conclusions that the state support for SMEs has been effective and helped to avoid a sharp decline in production. However, the spread of the disease in other countries may threaten the recovery of the Chinese economy.

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A central question in science and technology of desalting is, can we predict optimal coastal sites to implement seawater irrigation? Freshwater only makes up 2.5% of all water on Earth but crop irrigation is responsible for 70% of freshwater demand. First, we compared the growth rates and the dehydration rates of 5 alternative seawater irrigation experiments of wheatgrass over 3 weeks' periods. The average salt tolerance threshold of wheatgrass is 6 dS m. When seawater salinity is increased >10.50 dS m, the growth, drainage volumes, leaching, and drainage salinities of wheatgrass did not show significant variations. When seawater salinity is increased to 12.25 dS m, grass leaves gradually turned light green, bent, and fell. Notably, pH in soil remained nearly constant in all experiments with mean pH of 6.05 ± 0.25 (mean ± SD). Next, we derived experimental equations to define a mechanistic link between salinity and desalination capacity in a Modified Saline Adjustable Desalination System (MSADS). A cost-benefit analysis for a MSADS in a coastal location of southern California indicated that this system is $0.84 m more expensive than using water from a natural reservoir, but $0.08 m less expensive than importing water. This study provides a general framework to assess the implementation of a desalination system in coastal locations.