Growing up, Teresa Vicente spent long days in Spain’s Mar Menor swimming in transparent waters, cupping seahorses in her hands and partying under the moonlit sky. Out there, she recalled, time stood still.

But over the decades, chronic contamination from mining, development and agricultural runoff turned the once crystal-clear waters of Europe’s largest saltwater lagoon into a graveyard. A mass fish die-off in 2019 prompted the professor of philosophy of law at the University of Murcia to take action.

Over the next several years, Vicente, now 61, led a grassroots campaign to save the region’s ecological jewel from collapse. Her efforts helped lead to a new law passed in 2022, giving the lagoon the legal right to conservation, protection and damage remediation.

Vicente is one of this year’s seven winners of the Goldman Environmental Prize, known as the “Green Nobel,” which honors grassroots activists and leaders from across the globe for achievements in protecting the natural world. The recipients were selected from about 100 nominees and the winners were announced Monday.

“(This prize) signifies an international recognition that we are facing a new stage in humanity,” said Vicente in Spanish. It’s a stage where “human beings understand they are part of nature. And this recognition means that it is not a local or national conquest, but rather a European and international one.”

“They call Mar Menor the lagoon of magic,” she added, “and all of us on this journey have seen a lot of magic.”