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The leather sector is an important source of materials for various industries and fields.This industry generates a big quantity of solid and liquid waste.The whole process that the skin is subjected to contains a series of operations and chemical reactions.Waste from the leather industry can be obtained by using multiple processing methods in different areas. Recovery of waste from the leather industry is an important factor for environmental protection. Nowadays, the elaboration of leather processing methods that...

Acoustic or phonic pollution is a type of noise pollution caused by noises, a complex of non-periodic sounds with random disagreeable insurgency that affects the psychological and biological state of human and animal organisms. The physical or objective characteristics of the noise are the strength or sound intensity (which depends on the features of the source, the distance and the possibilities of transmission or multiplication), duration and frequency. For the determination of the noise level, sound-meters, whi...

The air is a mixture of different gases and particular matter, which make up for the earth?s atmosphere. They allow for the existence of all life on the earth. With the increase in population and the progress of development, more and more substance of natural origin and on general not occurring in the nature, which may affect harmfully on the environment, gets into the air. Dusts and gases, flowing in excess into the atmosphere, cause local and even global pollution. Since the beginning of 2017 all the time in Pol...