Discussion
Which of the following is ecofriendly process of solid waste management ?
Answer: D
The ecofriendly process is conversion into compost, biogas or bioethanol.
Composting, anaerobic digestion to biogas and fermentation to bioethanol turn the biodegradable part of solid waste into useful products: soil conditioner, fuel gas and liquid fuel. They recover resources, reduce the waste sent to landfills and cut methane released from rotting waste in dumps.
Open dumping pollutes soil, water and air and breeds disease. Landfilling takes land and can leak leachate and methane. Incineration reduces volume but releases flue gases, dioxins and ash that need careful control. None of them is the ecofriendly choice the question asks for.
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