Review the following excerpt from a journalistic essay discussing the integration of vernacular bio-architecture into urban housing developments. Based on the passage, draw conclusions about the underlying motivations or ideological shifts of the different groups mentioned. Match each demographic or institutional group with the most accurate inference regarding their role.
"The recent municipal mandate integrating rammed earth and 'superadobe' techniques into subsidized urban developments has sparked a complex ideological realignment. Historically, the urban middle class and real estate developers relegated earthen architecture to the realm of rural precarity—a symbol of systemic abandonment. However, as international supply chains for steel and cement falter, and carbon-tax incentives become lucrative, major construction conglomerates are suddenly championing these vernacular methods under the sanitized banner of 'bioclimatic innovation.' Meanwhile, the original proponents—indigenous collectives and grassroots ecological cooperatives—find themselves marginalized from the very regulatory frameworks they inspired, unable to afford the new 'sustainable certifications' required by the state. Consequently, the Ministry of Housing celebrates a statistical triumph in emissions reductions, while quietly presiding over the gentrification of ancestral building techniques."
Match each group to the corresponding implied conclusion.
- Major construction conglomeratesTheir adoption of sustainable practices is driven primarily by economic opportunism and linguistic rebranding rather than a genuine environmental ethos.
- Grassroots ecological cooperativesThey are experiencing a paradox where their foundational knowledge is institutionally validated, yet their active participation is systemically excluded.
- The urban historical middle classTheir evaluation of housing materials was historically dictated by socioeconomic prejudice and class stigma rather than structural viability.
- The Ministry of HousingTheir policy success is achieved through the bureaucratic appropriation of community knowledge, prioritizing environmental metrics over social equity.