The document discusses two community-led sanitation approaches: Community Led Total Sanitation (CLTS) and the Orangi Pilot Project (OPP) in Pakistan. Both approaches define the sanitation problem as a lack of participation, ownership, and capabilities among the poor. CLTS uses "triggering" to encourage behavior change and focuses on natural local leaders to make entire villages open defecation free, with villagers deciding technologies. OPP uses motivational meetings and lane organizations to develop low-cost lane sewers with septic tanks, providing technical support but no subsidies. The lecture debates the sustainability and broader impacts of these approaches.