Yellow River stream has lots of water resource issues, low quality and imbalanced. Understanding the factors influencing water resource use efficiency and mastering the relation between water resource use and high-quality economic development are important to boost the sustainable development in Yellow River stream. This paper uses undesired output super-efficiency SBM model and entropy to estimate 2011 to 2020 water resource use efficiency and high-quality economic development comprehensive index of Yellow River stream, and discusses their relation by means of Tapio decoupling model, and employs Tobit model to test the factors influencing water resource use efficiency. Results suggest that 2011 to 202 average water use efficiency in Yellow River stream is less than 1, far reach to be effective, but the high-quality economic development shows a rising trend, both varying geographically, decreasing from down-to upper-stream. Their relation has been fluctuating during 2011 to 2020, which had undergone weak decoupling, strong decoupling, expansive connection, weak decoupling, expansively negative decoupling and strong decoupling. Economic development level, technical innovation and governmental influencing power play a positive role on water resource use efficiency in Yellow River stream, but industrial structure and water use structure does on the contrast.

This paper, based on a case study of Songtao manganese integrated exploration area in Guizhou, uses entire life cycle to discuss its environmental issues during manganese mining and processing, evaluates servicing values of ecological system, regional carbon fixation capacity, and carbon emission from mining, shipping and fine processing, and studies its environmental impacts evolutional path of study area from 2003 to 2015. Mine environment has been severely impacted in the three stages, of which loss in ecological system service is in mining stage, carbon emission impacts in shipping and processing. The regional ecological environment is increasingly impacted as mining and developing manganese activities grow. This paper presents suggestions on consolidating mining rights, raising concentration of electrolytic manganese companies, improving mining technology and boosting environmental controls in order to reduce environmental impacts.

This paper uses input/output to calculate the total, direct and indirect carbon emission of China’s tourism industry in 2002, 2005, 2007, 2010 and 2012, and applies LMDI to decompose the total carbon emission variables. Results show a rising overall carbon emission but a falling carbon emission intensity, mainly contributed by transportation, food and lodging, and shopping. Indirect carbon emission amounts to 70% of total emission. Rise of tourists and rising personal expense are key reasons in boosting carbon emission in tourism industry. Descend in carbon emission intensity can effectively impede carbon emission. Income structure has no impact on carbon emission. This paper presents the major paths to reduce carbon emission in tourism industry, including reducing carbon mission intensity, converting tourists’ consumption habitats, and controlling tourism size. It needs actions from transportation, food and lodging and shopping, and from intermedium industrial departments as well.

Selenium as a dispersed element is very low in the earth. The study on selenium deposits is poor resulting in issues in exploring and developing selenium deposits. This paper, based on selenium geochemistry and deposit types, studies the selenium in soils and plants of biosphere, combined with its global demand and prices, discusses the situation and finds the supply & demandconflict,which makes study on selenium urgent,especially on its source and concentrating. This paper can provide reference for exploration of selenium deposits.

Sanqing in Jiangxi, wellknown for its granite geology and granite terrain with over one billion years` evolution, is a geological heritage site with great values in science. Scientific classification and dynamic monitoring on geological heritages are fundamental to the protection, management and utilization of geoparks and world natural heritages. This paper, based on a field investigation, classifies Mt. Sanqing`s geological heritages into five categories, i.e., terrain, stratigraphy, structure, paleontological fossil and typical rocks. It is belieued that Mt. Sanqing is a natural geological museum with global comparison significance in a few domains, whose geological diversity deserves conservation.

Tourism depends upon resources, but will definitely exert impact on environment during development. The environmental issue is a hot topic in tourism development. This paper, based on three tourism land utilization, including touring land, tourism establishments land and tourism administration land, analyzes the impact over ecological environment, especially in air, water, soil, etc, and presents some references for tourism development and planning.