Read the following passage carefully:
To alleviate the severe environmental and financial strain of overflowing regional landfills, municipal corporations across several tier-two cities have launched a scheme subsidizing neighborhood-level decentralized composting units. Under this model, residential welfare associations receive financial assistance and technical support to treat organic waste at source, significantly reducing the volume of refuse transported to central dumpsites. Policy planners assert that diverting biodegradable waste prior to municipal collection will simultaneously lower vehicular transit emissions, reduce municipal fuel expenditures, and extend the operational lifespan of existing landfill infrastructure. However, civic activists highlight that previous municipal environmental initiatives suffered from low public compliance and chronic maintenance lapses once initial capital subsidies lapsed. For this decentralized composting initiative to achieve its projected fiscal and environmental targets, residents must consistently segregate waste at the household level and actively participate in facility upkeep.
Statement: A necessary underlying assumption of the policy planners' argument is that organic waste constitutes a significant enough portion of total residential refuse that its at-source diversion will substantially reduce overall landfill load.
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