From imitative innovation to independent innovation——Study on the technology progress path conversion of steel industry in our country;

Research on the Development mode of the Circular Economy of the Steel Industry in Hebei Province;

A Study on Industrial Concentration of Steel Industry in China;

Study on Market Structures for Iron and Steel Industry of China Based on Concentration;

Application of Multi-Barycenter Method to China s Iron and Steel Industry;

Study on Efficiency and Productivity of China's Iron and Steel Industry

The iron & steel industry and its industrial chain,which is formed by the industry,are important industry and industrial group of Hebei province.

The iron & steel industry and the industrial chain,which are composed of iron & steel,are important industry and industrial group of Hebei province.

The Iron & Steel Industry plays an important role in the world economy; however, it has been in the mature period.

As one of the most important leading industries in Hebei, the steel industry plays a decisive role in economic and social development.

This paper discusses on the research programs and effects of removing the environmental pollution with the farming byproducts,purifying the air with the one-celled phycophyta,purifying the sewage with the aquatic multicellular plants,selecting different EP plants according to the different pollution sources,and detecting the air pollution by using the trees,flowers and grasses,etc.