Sac biodegradable plastic bags have the same strength as ordinary plastic and cost very little extra. They will degrade then biodegrade if they get into the open environment, but they can be recycled if collected during their useful life. They are designed so that they will not degrade deep in landfill and will not therefore generate methane. Biodegradable plastic is bio enzyme by the same bacteria and fungi, which transform natural material such as twigs and leaves to cell biomass, like lignocellulosic materials. Bio degradable plastic is designed to degrade initially by a process which includes photo-oxidation and thermo-oxidation, so it can degrade in the dark. Biodegradable plastics, biodegradable, compostable: Common plastics bag need to garbage bags and kitchen garbage separately for kitchen waste composting, while the use of my company full degradable garbage bags is not needed to separate, eliminating the need for manual operation. Compost waste into bio organic fertilizer, can help improve soil quality, reduce the loss of arable land. Biological organic fertilizer compared with chemical fertilizer: 1 biological organic fertilizer with complete nutritive elements; fertilizer only one or several; 2 bio organic fertilizer could improve soil; fertilizer use will cause soil compaction; 3 bio organic fertilizer could improve the quality of products; over application of fertilizers resulted in products of inferior quality; 4 bio organic fertilizer could improve the crop rhizosphere microorganisms, improve the plant pest and disease resistance; fertilizer make crop microbial population is single, prone to diseases and insect pests; 5 the use of bio organic fertilizer could promote fertilizer, increase fertilizer utilization; the use of chemical fertilizers alone is easy to cause the fixed and the loss of nutrient. -