Read the passage below carefully:
"For decades, artisanal salt miners along the coastal lagoons of Akwa Ibom relied on wood-fueled evaporation pits to process brine, a method that caused severe local mangrove deforestation and yielded discolored, low-grade salt. Recognizing the ecological and financial toll, a sustainable development initiative introduced elevated solar evaporation pans coupled with sand-filtration units. The filtration process removes organic sediment prior to evaporation, producing high-purity white salt while entirely eliminating the need for firewood. As a result, coastal communities have successfully preserved critical mangrove ecosystems while earning higher profit margins through refined salt sales."
Based on the passage, arrange the synthesized summary statements in their correct logical sequence, tracing the progression from the background problem to the final outcome.
- 1Artisanal wood-fueled salt processing caused severe mangrove deforestation and yielded discolored salt.
- 2A sustainable initiative introduced elevated solar evaporation pans combined with sand-filtration units.
- 3Filtration removed impurities prior to solar evaporation, producing high-purity salt without firewood.
- 4Coastal communities achieved mangrove conservation alongside increased earnings from refined salt sales.