
Project
Photo: Ana Rodríguez Carrington (CC BY 2.0)Victory: Biosphere Reserve in Baja California Saved from Toxic Mine
Known as an “ecological treasure house,” the Sierra La Laguna Biosphere Reserve at the southern tip of Baja California will not be spoiled by toxic mine waste, thanks in part to AIDA’s advocacy.
The reserve was once an island, so it’s home to rare plant and animal species. Canyons, swimming holes, and hot springs can be found in its granite mountain range and lowland tropical forests.
Thanks to AIDA and our partners in Mexico, the Mexican government denied an environmental permit for the Paredones Amarillos gold mine, halting the project for the time being. To protect the biosphere reserve, AIDA helped educate community groups and decision makers about the mine's risks. This helped to build the political momentum necessary for the government to deny the permit.
To extract gold from the mountains, the Canadian company Vista Gold proposed to carve out huge quantities of rock—each ton containing a mere gram of gold–-grind it into sludge, and treated it with cyanide. The company planned to dump massive amounts of toxic waste (called “tailings”) behind a dam intended to store it forever. Unfortunately, tailings dams can break for various reasons, as happened at Bolivia’s Porco mine in 1996. When that dam collapsed, more than a quarter million metric tons of tailings flooded the river and contaminated 500 miles (800 km) of waterways in Bolivia, Argentina and Paraguay.
The mine could also cause acid mine drainage. When sulfur-containing rocks are exposed to air and water, sulfuric acid forms, which causes toxic heavy metals to dissolve and drain into the watershed. The risk of acid mine drainage in Sierra La Laguna was significant and the human and environmental cost would have been tremendous: thousands of people and countless wildlife in the reserve rely on its water for survival.
Depleting freshwater is a further threat because mines use tremendous quantities of water. Owing to the scarcity of water in the reserve, Vista Gold proposed to build a plant on the Pacific coast to remove salt from sea water in a highly energy-intensive process, and then pump the water 45 km to the mine site. The desalination plant posed a threat to the endangered leatherback sea turtle.
Singly and together, the mine’s impacts would have devastated a rare jewel, a unique and lush paradise worth saving for future generations.
Related projects

Why we’re working for climate justice in Latin America
“The world has many problems, but to me none seem as ubiquitous or as dangerous as climate change,” says AIDA attorney Florencia Ortúzar. “It really is the great challenge of our generation.” At AIDA we understand the magnitude of the problem. That’s why we incorporate climate justice as a key concept in all our lines of work. It’s why we advocate for sustainable development that respects the environment and the rights of vulnerable communities and, at the same time, why we work to stop climate-aggravating activities. “What motivates me to fight climate change is my awareness of the huge problem we’re facing, and my steadfast determination—I know we can’t give up,” Florencia says. She shares that motivation with AIDA’s entire team of attorneys, scientists, communicators, fundraisers and administrators. When she was a child, Florencia received a very special gift from her father: a badge that said “world saver.” That very day, on a beach in her native Chile, Florencia hooked the badge to her clothes and began picking up trash, cleaning the beach. That small gift jumpstarted her life’s mission. Florencia went on to study law, with the goal of working for the protection of forests, rivers, animals, and all the elements of the natural world. “Luck was with me when I found AIDA, the organization that has trained me and has enabled me to make my contribution to a better world,” she says. Florencia is part of AIDA’s Climate Change program. Our objective is to help Latin America—one of the regions most vulnerable to the climate crisis—be a leader in the type of changes required on a global level to avoid catastrophe. In partnership with allied organizations and hand-in-hand with communities, we work to stop the blind advance of fracking and large dams, mega-projects which imply significant emissions of methane, a greenhouse gas 34 times more powerful than carbon dioxide. We also work to raise awareness and educate public policy makers on the importance of controlling short-lived climate pollutants. We seek to protect terrestrial and marine ecosystems that capture carbon emissions—such as coral reefs, mangroves, wetlands and páramos—which, in turn, helps to mitigate climate change. We monitor international climate negotiations, advocate for Latin American nations to have the necessary economic resources to deal with climate change, and work to ensure that climate finance respects human rights. “Although many of the effects of climate change are inevitable, and may already be occurring, the efforts we make to stop the problem and to adapt to it will help future generations, who had nothing to do with causing the problem,” Florencia explains. She shares her message wherever she goes, encouraging others to join the fight. “I refuse to be part of the last generation to enjoy the natural wonders of our planet.”
Read more
Why we’re working for climate justice in Latin America
“The world has many problems, but to me none seem as ubiquitous or as dangerous as climate change,” says AIDA attorney Florencia Ortúzar. “It really is the great challenge of our generation.” At AIDA we understand the magnitude of the problem. That’s why we incorporate climate justice as a key concept in all our lines of work. It’s why we advocate for sustainable development that respects the environment and the rights of vulnerable communities and, at the same time, why we work to stop climate-aggravating activities. “What motivates me to fight climate change is my awareness of the huge problem we’re facing, and my steadfast determination—I know we can’t give up,” Florencia says. She shares that motivation with AIDA’s entire team of attorneys, scientists, communicators, fundraisers and administrators. When she was a child, Florencia received a very special gift from her father: a badge that said “world saver.” That very day, on a beach in her native Chile, Florencia hooked the badge to her clothes and began picking up trash, cleaning the beach. That small gift jumpstarted her life’s mission. Florencia went on to study law, with the goal of working for the protection of forests, rivers, animals, and all the elements of the natural world. “Luck was with me when I found AIDA, the organization that has trained me and has enabled me to make my contribution to a better world,” she says. Florencia is part of AIDA’s Climate Change program. Our objective is to help Latin America—one of the regions most vulnerable to the climate crisis—be a leader in the type of changes required on a global level to avoid catastrophe. In partnership with allied organizations and hand-in-hand with communities, we work to stop the blind advance of fracking and large dams, mega-projects which imply significant emissions of methane, a greenhouse gas 34 times more powerful than carbon dioxide. We also work to raise awareness and educate public policy makers on the importance of controlling short-lived climate pollutants. We seek to protect terrestrial and marine ecosystems that capture carbon emissions—such as coral reefs, mangroves, wetlands and páramos—which, in turn, helps to mitigate climate change. We monitor international climate negotiations, advocate for Latin American nations to have the necessary economic resources to deal with climate change, and work to ensure that climate finance respects human rights. “Although many of the effects of climate change are inevitable, and may already be occurring, the efforts we make to stop the problem and to adapt to it will help future generations, who had nothing to do with causing the problem,” Florencia explains. She shares her message wherever she goes, encouraging others to join the fight. “I refuse to be part of the last generation to enjoy the natural wonders of our planet.”
Read more
Why we’re working for climate justice in Latin America
“The world has many problems, but to me none seem as ubiquitous or as dangerous as climate change,” says AIDA attorney Florencia Ortúzar. “It really is the great challenge of our generation.” At AIDA we understand the magnitude of the problem. That’s why we incorporate climate justice as a key concept in all our lines of work. It’s why we advocate for sustainable development that respects the environment and the rights of vulnerable communities and, at the same time, why we work to stop climate-aggravating activities. “What motivates me to fight climate change is my awareness of the huge problem we’re facing, and my steadfast determination—I know we can’t give up,” Florencia says. She shares that motivation with AIDA’s entire team of attorneys, scientists, communicators, fundraisers and administrators. When she was a child, Florencia received a very special gift from her father: a badge that said “world saver.” That very day, on a beach in her native Chile, Florencia hooked the badge to her clothes and began picking up trash, cleaning the beach. That small gift jumpstarted her life’s mission. Florencia went on to study law, with the goal of working for the protection of forests, rivers, animals, and all the elements of the natural world. “Luck was with me when I found AIDA, the organization that has trained me and has enabled me to make my contribution to a better world,” she says. Florencia is part of AIDA’s Climate Change program. Our objective is to help Latin America—one of the regions most vulnerable to the climate crisis—be a leader in the type of changes required on a global level to avoid catastrophe. In partnership with allied organizations and hand-in-hand with communities, we work to stop the blind advance of fracking and large dams, mega-projects which imply significant emissions of methane, a greenhouse gas 34 times more powerful than carbon dioxide. We also work to raise awareness and educate public policy makers on the importance of controlling short-lived climate pollutants. We seek to protect terrestrial and marine ecosystems that capture carbon emissions—such as coral reefs, mangroves, wetlands and páramos—which, in turn, helps to mitigate climate change. We monitor international climate negotiations, advocate for Latin American nations to have the necessary economic resources to deal with climate change, and work to ensure that climate finance respects human rights. “Although many of the effects of climate change are inevitable, and may already be occurring, the efforts we make to stop the problem and to adapt to it will help future generations, who had nothing to do with causing the problem,” Florencia explains. She shares her message wherever she goes, encouraging others to join the fight. “I refuse to be part of the last generation to enjoy the natural wonders of our planet.”
Read more