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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
Whales and salmon farming: how does the industry impact our gentle marine giants?
Chile is by nature a country of marine mammals. Of the 94 species of cetaceans existing in the world, 43 have their habitat in the country's waters. And just over a quarter of them are found in Patagonia. But Chile is also a country of salmon, occupying the second place in the world production, sured only by Norway. The overlap of the salmon industry with the habitat of these emblematic marine mammals represents a significant threat to cetaceans in Chile about which not enough is known.The recent deaths of three whales in protected areas of Chile's southern seas force us to ask ourselves why they are dying and how they are affected by the growing industry with which they share their habitat.Civil society is responding. In early November 2024, Greenpeace - together with the Kawésqar community Grupos Familiares Nómadas del Mar and with the of AIDA - filed two criminal complaints against those responsible for the deaths of humpback whales in protected areas.These lawsuits, which have already been declared issible, represent an unprecedented milestone in the country's criminal history, as they are the first take advantage of the amendaments made to the Penal Code by Law 21,595 on Economic and Environmental Crimes to the Penal Code to file a lawsuit for possible violations committed inside protected areas.In this context, AIDA, together with Greenpeace and the NGO FIMA - historical allies in the resistance to the expansion of salmon farming in the waters of Chilean Patagonia - commissioned a scientific report entitle “Cetaceans and Salmon Farming: Challenges for the Protection of Marine Biodiversity in Chilean Patagonia.”The report is currently available in Spanish, which lays out the available information on the impacts of salmon farming on the whales and dolphins of Chilean Patagonia. The results are alarming: serious risks have been identified, in addition to a lack of data that makes it difficult to understand the magnitude and consequences of the threats.One of the most evident impacts is the incidental capture of small and large cetaceans in farming centers. There are documented cases of entanglement and deaths, although the lack of official records makes it difficult to measure the severity of the problem.Another significant threat is the Intense maritime traffic in Patagonia, largely related to the salmon industry. Although there is no official data in Chile, there is evidence of deaths and serious injuries due to collisions between boats and whales. In addition, underwater noise from boat engines affects the health and well-being of the whales and dolphins, which depend on sound for communication and orientation.In addition to these, there are other problems of the industry, whose effects on whales and dolphins have not been adequately studied, but which we should consider while the studies are being conducted. One of these is the escape of salmonids, which compete with native species for food resources and may carry diseases that could affect smaller cetaceans in particular by reducing the availability of prey that serve as food.Microplastic pollution, 40 percent of which comes from salmon farming centers, is another under-researched environmental concern in of its impact on cetaceans. And the excessive use of antibiotics in Chilean salmon farming, one of the highest rates in the world, could be having negative indirect effects on the ecosystems that these marine mammals.Finally, one of the most significant environmental impacts of the salmon farming in Chilean Patagonia is the generation of hypoxia and anoxia due to the excess of organic matter in the farming centers, coming from salmon feces and uneaten food that falls to the seabed. The decomposition of this matter consumes the oxygen in the water, creating zones in the sea where life becomes difficult or impossible.We hope that this report will fill the information gap that has become uncomfortable and even untenable in light of recent whale deaths.With this evidence, even in a scenario of limited knowledge, we will be able to encourage a governmental response towards the rapid implementation of effective protection measures for whales and dolphins in Chilean waters.Chile is a country of cetaceans, and as their guardians, we must ensure that our waters are a safe space for their development and well-being. Read and the report (in Spanish)
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Closure and Responsible Exit
A requirement for environmental and climate justice in Latin America No natural resource (material or energy) extraction project lasts forever. Its useful life is subject to many variables, including endogenous factors -such as the amount of resource reserves or the extraction rate- and exogenous factors -such as decisions to address the climate crisis, the decrease in demand, financial problems, etc.- that condition the moment in which the project must close or the moment in which an actor in its value and supply chain must leave. Regardless of the length of the project's useful life or how it may be affected, a responsible closure process with the natural environment and society must be contemplated, which must be desired and promoted by all the stakeholders involved.This issue is even more relevant in the context of the climate crisis we are experiencing, which makes it urgent to implement measures to manage it in the short, medium and long term. Many of the actions required to meet greenhouse gas (GHG) mitigation targets are related to energy transition, which implies, in general , at least two things: 1) the substitution of fossil fuel extraction and use projects and 2) the promotion of low-emission renewable energies, which are associated with mineral extraction. In both scenarios, closure and exit issues are of great importance.In both extraction and generation projects, the role of their promoters, whether public or private, is essential. Likewise, the obligation of supervision and oversight of the States is very important for the protection and guarantee of the rights of those who may be affected. On occasions, the responsibility of the exit includes other key actors that are part of the value and supply chains of the projects: investors, insurers, distributors and buyers, among others.In Latin America, there have been important advances in regulating aspects related to the authorization, start-up and implementation of mining and energy projects. In these phases, environmental principles such as prevention and precaution, as well as rights such as prior consultation and free, prior and informed consent, and access rights, have played a crucial role in determining the viability and progress of projects, as well as in protecting and guaranteeing the rights of communities in the region. However, experience has shown that there are significant challenges for the closure and exit processes to be responsible with the ecosystems and communities involved. Indeed, the lack of a closure process, as well as the lack of clarity about the obligations surrounding the social transition processes and overcoming the conditions of economic dependence, are complex obstacles that can exacerbate environmental and social impacts. This report arises from the idea of proposing approaches based on law and science to address the closure and responsible exit of projects. To this end, we at the Interamerican Association for Environmental Defense (AIDA), in the period 2022-2024, interviewed various stakeholders1 and systematized 12 cases that exemplify the problematic situation of multiple fossil fuel extraction, mineral and power generation projects, which are in the closure phase or in exit processes in different countries of the region. These cases highlight the current challenges and legal, technical and istrative gaps regarding closure and exit in specific contexts.With this publication, we seek to provide answers to the following questions: what is meant by project closure and exit, what is the basis for closure and exit obligations under international law, what should closure and exit look like, who should be involved in these processes, and how should the social, environmental, economic and human rights challenges and impacts that arise from them be addressed">