Alexis Massol González and Faustina “Tinti” Deyá Díaz were the Puerto Rican couple who helped build Casa Pueblo, a community-based organization in Adjuntas that began in 1980 as part of a campaign against proposed mining in the island’s central mountains. Their work eventually expanded from environmental opposition into community forestry, education, culture, sustainable economic development and renewable energy. Casa Pueblo identifies both Deyá and Massol among its founding members.
Massol, a civil engineer, became the organization’s most internationally recognized environmental advocate and received the 2002 Goldman Environmental Prize for his role in the campaign against open-pit mining. Deyá, an educator and community organizer, was equally important to the project’s development, although her contribution has historically received less international attention. She died in 2021; Massol continued working with Casa Pueblo, while their family and colleagues carried the organization forward.
From Adjuntas to Casa Pueblo
The story of Casa Pueblo is inseparable from the mountains of central Puerto Rico.
In the late 1970s and early 1980s, plans for mining deposits of copper, silver and gold threatened a large area around Adjuntas and neighboring municipalities. The Goldman Environmental Prize says the proposed operations involved more than 35,000 acres of mountainous terrain and raised concerns about pollution, toxic residues, forests and watersheds.
Massol and Deyá responded by helping organize residents rather than treating the issue solely as a technical or political dispute. Casa Pueblo describes its original project as a form of community self-management focused on protecting natural, cultural and human resources. The organization says the campaign ultimately lasted from 1980 to 1995.
The organization itself initially operated under the name Taller de Arte y Cultura. A house acquired in 1985 eventually became its headquarters and gave the wider community initiative the name Casa Pueblo. Over time, that building developed into a cultural and community center rather than simply an environmental campaign office.
Alexis Massol: the engineer behind the environmental campaign
Alexis Massol González trained as a civil engineer at the University of Puerto Rico at Mayagüez. His professional background helped give the anti-mining campaign a technical dimension, while his community organizing connected that expertise to residents of the affected mountain region.
The campaign faced a complicated political history. According to the Goldman Environmental Prize, the government rejected a mining proposal after a grassroots campaign in 1986, but mining permits were granted again in 1993. Casa Pueblo says the broader struggle ultimately ended with the government abandoning the project in 1995.
That distinction matters because Casa Pueblo’s achievement was not simply stopping a single development proposal. The organization sought to create an alternative economic and environmental model for the region.
One result was Bosque del Pueblo, or the People’s Forest. In 1996, the former mining area became a forest reserve whose management was entrusted to the community. The Goldman Environmental Prize describes it as Puerto Rico’s first community-managed forest reserve and notes that conservation, shade-grown coffee and ecotourism became part of the area’s development model.
Massol received the Goldman Environmental Prize in 2002 for this broader environmental work. The award made him one of Puerto Rico’s best-known environmental advocates internationally.
Tinti Deyá: the educator and community organizer beside him
Tinti Deyá’s role is essential to understanding Casa Pueblo because she was not simply Massol’s spouse who happened to participate in the organization. Casa Pueblo identifies her as a co-founder, and accounts of her life describe decades of community organizing in her own right.
Born Faustina Deyá Díaz in Adjuntas in 1940, she became a teacher after studying at the University of Puerto Rico in Río Piedras. Her experience in education brought her into an earlier environmental struggle: during the 1970s, she campaigned for the removal of asbestos from schools. EnciclopediaPR describes her as an organizer who raised awareness and protested over the issue.
That background helps explain the distinctive character of Casa Pueblo. Environmental protection was connected to education, public health, culture and community participation rather than treated as a separate conservation activity.
Deyá and Massol had known each other since their youth and later married and raised a family. Their surviving correspondence, preserved in a Casa Pueblo exhibition, documents their relationship beginning in their university years and offers a more personal view of the partnership behind the organization.
Casa Pueblo has subsequently described Deyá as a central figure in its identity and continues to commemorate her contribution. In 2025, the U.S. Fish and Wildlife Service inducted her into its hall of fame of environmental leaders.
Massol and Deyá’s roles at a glance
| Person | Background | Major contribution to Casa Pueblo | Later significance |
|---|---|---|---|
| Alexis Massol González | Civil engineer, community organizer | Helped lead the campaign against proposed mining and develop the community-management model behind Casa Pueblo | Received the 2002 Goldman Environmental Prize; remained associated with Casa Pueblo’s environmental and energy initiatives |
| Faustina “Tinti” Deyá Díaz | Teacher, community organizer and cultural figure | Co-founded Casa Pueblo, organized around environmental and community issues, and helped develop its culture of self-management | Died in 2021; subsequently honored for her environmental and community leadership |
Why the mining victory was only the beginning
Casa Pueblo’s philosophy evolved from protest to proposal.
Stopping mining did not by itself answer the economic question facing a rural mountain community. The organization therefore developed projects intended to demonstrate that environmental protection and local economic activity could coexist.
One example was Café Madre Isla. Casa Pueblo’s own account says the idea emerged in 1989 after Massol and Deyá saw coffee flowering in Jayuya. Deyá proposed using coffee as a source of economic self-sufficiency, even though the founders initially had little knowledge of coffee cultivation. They turned to community members with agricultural expertise and developed the project collectively.
This became characteristic of Casa Pueblo’s approach: build alternatives rather than simply oppose development.
The same philosophy eventually extended to education, ecological projects, cultural activities and renewable energy. Casa Pueblo describes its headquarters as a community center containing, among other activities, educational, cultural, agricultural and solar-energy projects.
Why solar energy became part of their environmental work
Casa Pueblo’s later reputation is closely associated with solar power, but the organization’s interest in renewable energy predates Hurricane Maria.
Casa Pueblo says it began installing solar panels in 1999. By 2017, the organization had reached energy independence at its headquarters shortly before Hurricane Maria devastated Puerto Rico’s electrical infrastructure.
The timing proved consequential.
When Maria struck Puerto Rico in September 2017, Casa Pueblo’s solar-powered facility was able to continue operating while much of the surrounding electrical system was down. Reporting from PBS and Oxfam documented the building’s role in providing electricity and community assistance after the hurricane.
The experience changed the scale of Casa Pueblo’s energy work. Rather than treating solar power solely as an environmental technology, the organization promoted it as infrastructure for community resilience and energy independence. Its subsequent projects included helping other facilities and businesses adopt solar systems and developing community microgrid concepts.
That evolution also illustrates one of the most enduring ideas associated with Massol and Deyá: environmental activism becomes more powerful when communities can demonstrate a workable alternative.
A partnership that shaped an institution
It is tempting to reduce the story to a famous environmentalist and his wife. The historical record points to something more complicated.
Massol brought engineering training and became the organization’s internationally recognized environmental advocate. Deyá brought experience as an educator and community organizer and played a substantial role in the organization’s social and cultural development. Casa Pueblo itself identifies both as founding members, alongside volunteers and other participants.
Their work also became a family and community project. Their son Arturo Massol Deyá subsequently became an important leader at Casa Pueblo, and the organization continues to operate as a broader community institution rather than simply as the personal foundation of its original founders.
This distinction is important when evaluating Casa Pueblo’s legacy. Its history cannot be understood entirely through individual awards or personalities. The organization’s defining concept is collective self-management: residents, volunteers, educators, scientists and community institutions participating in projects intended to protect and develop the region.
What happened to Tinti Deyá?
Tinti Deyá died in August 2021 at her home in Adjuntas at the age of 80. Her family reported that she died after complications associated with emphysema.
Her death did not end her institutional influence. Casa Pueblo continues to commemorate her, including through educational and cultural material dedicated to her life. In 2025, the U.S. Fish and Wildlife Service’s recognition of Deyá added another formal acknowledgment of her environmental leadership.
Massol has also continued to speak about their shared history. In a 2025 account of a book based on their correspondence, he revisited the relationship and memories that preceded Casa Pueblo by decades.
Why Alexis Massol and Tinti Deyá still matter
The lasting significance of Alexis Massol and Tinti Deyá is less about a single environmental victory than about the institutional model that emerged from it.
They helped turn a local fight over mining into a permanent community organization. That organization subsequently connected forest conservation with economic alternatives, education, culture and renewable energy. The transition from opposing an unwanted project to building institutions that could serve the community is central to understanding Casa Pueblo’s history.
Their story also explains why Casa Pueblo became especially visible after Hurricane Maria. The solar infrastructure that had seemed like one part of a broader environmental philosophy suddenly became critical community infrastructure when the centralized power system failed. That experience gave practical meaning to the founders’ long-standing emphasis on local capacity and self-sufficiency.
The most important legacy, therefore, is not simply the name attached to an environmental prize. It is the idea that began in Adjuntas in 1980: a community can combine scientific knowledge, cultural identity, economic activity and collective organization to protect the place in which it lives. Casa Pueblo’s continuing work—and the generations now carrying it forward—are the clearest evidence that Massol and Deyá built something intended to outlast the founders themselves.