Estudios (2) Gestión (2) Estudio (2) Cuba (1) Angola (1) Environmental management (1) Programs (1) Sustainable development (1) Employees (1) Villages (1) Trials (1) Tools (1) Technology (1) Surveys (1) Solids (1) Science (1) Revelation (1) Refuse and refuse disposal (1) Quality of products (1) Interviews (1) Project management (1) Indexes (1) Identification (1) Health promotion (1) Health (1) Hazardous wastes (1) Generals (1) Executives (1) Environmental education (1) Education (1)