The background of thatsome azo dyestuffswhich are harmful to human body was prohibited from using by European Union is briefly introduced.Moreover,the reduction or decomposition products and intermediate compounds of these azo dyestuffs are introduced,including their chemical names,toxicology and the typesof toxicity.

Color is one of evaluating indexes of food.It is necessary to know something about food colors as people have more and more artificial food with the development of food industry.In this paper,some knowledge about food colors and their advantages and disadvantages to the health of human body.

In this paper,the characteristics of POPs are given.The kind,structure,usage and harm of twelve POPs inhibited by STOCKHOLM CONVENTION are introduced.In addtion,the status of POPs in China is also given.

As a photocatalysis environmental material,nanometer TiO₂ can effectively degrade pollutants,and mineralize them to CO₂,H₂O and other inorganic smallmolecule substances.So nanometer TiO₂ can be applied to waste water treatmen,t air cleaning,sterilization and deodorization.In this paper,a review is given on its preparation and photoinduced superhydrophilicity mechanism of nanometer TiO₂,and the research progress and application prospect of nanometer TiO₂ in self cleaning building materials and sterilization etc.

Teachers' curriculum consciousness plays a more important role in development of subject education confronting with rapid development of subject and backwardness of subject education.Curriculum consciousness of green chemistry is the teachers' basic understanding of the green chemistry curriculum system and the basic reflection of green chemistry curriculum design and operation.The significance of arousing the curriculum consciousness of green chemistry is according with the needs of the times,the promotion of the principal status of teachers and ensuring the implementation of green chemistry curriculum.The curriculum design includes object design,frame design,content design and evaluation design,based on curriculum consciousness of green chemistry.