התשובה הארוכה, המסויגת, שמציגה טיעון מורכב לשני הצדדים
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GPT explains (level =C2; CEFR aligned):
Irrigating with raw (untreated) wastewater
From a water‐resources standpoint the reuse of municipal effluents can ease pressure on freshwater supplies and supply nutrients to crops, yet raw wastewater is also a concentrated vector of enteric pathogens, helminth eggs, heavy metals and emerging micropollutants. An irrigation adviser who adheres to the “multiple-barrier” approach endorsed by the WHO would therefore reject direct use of raw effluent and insist on at least secondary biological treatment plus disinfection—or, in low-income settings, soil infiltration and crop restrictions that achieve equivalent log-reductions of risk. In other words, the agronomic and socio-economic benefits are acknowledged, but they do not override the duty of care to downstream consumers and field workers; controlled treatment is a non-negotiable pre-condition for safe reuse.