Which disposal systems are being encouraged to improve sanitation now a days?

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Solution

To improve sanitation, biogas plants and vermi-composting toilets are being encouraged nowadays.
Biogas plants: Human and animal excreta flow through covered drains into biogas plants where microorganisms break down the waste to produce biogas. This biogas can be used to produce electricity.
Vermi-composting toilets: In this, earthworms are used to convert human excreta into compost. There is minimal usage of water and is a safe and hygienic way of processing human waste.

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