The document discusses different types of solid wastes: - Green waste includes garden and food waste that is high in nitrogen and can be used to create biogas. - Brown waste contains carbon-based materials like leaves and cardboard that are necessary for composting along with green waste. - Red waste refers to hazardous items like electronics, paint and batteries that cannot go in regular trash. - White waste is paper waste from offices and schools. - Vermicomposting uses worms to break down food and plant waste into a nutrient-rich fertilizer called vermicast.