Targets are reviewed by teams of national and international experts in waste management. Current socio-economic regional conditions and current trends in waste management are taken into consideration in target setting, Evaluations consist of yearly, semester and three-month reviews to measure target achievements. This concentration has shifted consumption and waste-generation patterns so that solid waste is generated at a higher rate and is more heterogeneous in composition than in past years. Concern with regard to waste management generally exists around enforcement issues.