Anaerobic digestion Biogas and global warming 1 Biogas plant models 1 Biogas spent sturry as manure 1 Biogas technology 1 Biological treatment, Solid waste 1 Biological waste treatment 1 Biowaste 1 Composting 1 Economics 1 Energy-economics 1 Glass recycling 1 Healthcare risk waste 1 Incineration 1 Landfilling, Solid waste management 1 Paper recycling 1 Plastic recycling 1 Renewable energy development 1 Thermal recycling 1 Thermal treatment. Solid waste 1 Wind power 1