5Dominic H, Josef B, Enzo F, et al. Comparison of compost standards within the EU, North Amenca and Australasia[MJ.The Waste and Resources Action Programme, 2002: 37.
6Scoulding K, Revel R. Collecting, processing and financing yard trimming programs[J]. Biocycle Magazine, 1999, 9: 66.
7European Union. EU Directive 99/31/EC on the landfill of waste [S]. Off. J. Eur Communities L, 1999, 182: 1-19.
8Kim A. O' Connell. Seeking greener pasture, In an era when some recycling programs are suffering, one sector of waste management continues to grow, literally: yard waste[M]. Waste age, 2004: 33-38.
9Turner R K, Salmons R, Powell J, Craighill A. Green taxes, waste management and political economy[J]. J Environ Manag, 1998, 53: 121-36.
10A report to the city of Peoria from the Coalition to Oppose Attacks on Recycling in America. How to optimize handling of yard trimmings by minimizing costs and maximizing diversion[R]. 2002.