From The Yale School of the Environment: “Can Gold Mining Be More Sustainable?”
From The Yale School of the Environment
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9.28.22
Josh Anusewicz
Assistant Editor
joshua.anusewicz@yale.edu
+1 203-436-8994
Credit: The Yale School of the Environment.
FIGURE 1
Left—A large gold mining pit in Guyana (image by Michelle Kalamandeen). Right—An aerial photo of a large-scale opencast gold mine in Namibia. In large-scale gold mining operations, vast areas of land are converted to construct access roads, mining pits, overburden heaps, and tailings storage facilities (Image by Hanspeter Baumeler)
FIGURE 2
Left—an isolated ASGM site in the Amazon (image by Sue Palminteri/Mongabay). Right—an aerial photo depicting the considerable extent of ASGM operations in the Peruvian Amazon (image by Rhett A. Butler/Mongabay)
More instructive images are available in the science paper.
A YSE-led study details the severe degradation and deforestation caused by gold mining in tropical forests, as well as the biophysical challenges associated with effectively restoring these landscapes.
Every other year, Mark Ashton, Morris K. Jesup Professor of Silviculture and Forest Ecology, teaches a popular course at the Yale School of the Environment on tropical forest restoration, which highlights tropical forest degradation and deforestation and strategies for restoring these landscapes.
It was this course that inspired Shrabya Timsina ’20 MF and Nora Hardy ’22 MESc to investigate one of the most severe forms of environmental degradation in the tropics —surface mining — to understand the ways in which surface mining affects ecosystems and potential strategies for restoring mining sites.
In a review paper recently published in the journal Land Degradation and Development [below], Timsina and Hardy focused on the effects of surface gold mining in tropical regions, a growing environmental concern in recent years. According to a 2012 study, mining accounts for 7% of deforestation in developing nations and large-scale and artisanal, small-scale gold mining techniques such as open-pit mining and dredging are becoming more prevalent in the Amazon and West Africa.
The authors, who include Ashton and YSE doctoral student David Woodbury, focused particularly on gold mining — a topic “relevant for this particular moment,” says Timsina. Gold mining is becoming more prevalent, he explains, both because it is important for manufacturing electronics and alternative energy production, and persistently rising gold costs make previously unfeasible mining projects more lucrative.
Environmentally, however, the results are costly. “You can imagine what surface mining can do to surrounding areas,” says Hardy. “It completely reshapes the topography. It also depletes and disturbs the topsoil that contains nutrients and seeds necessary for plant growth, and tropical regions often have nutrient-poor soils already.”
Surface mining can also impact local hydrology. Numerous pollutants, including mercury and cyanide, are used in gold refining processes and can contaminate the soil and nearby water sources. Timsina says effective containment strategies against these pollutants must be used in concert with land restoration techniques to help the regrowth of plants and ensure the health of nearby human communities.
The researchers also investigated possible restoration strategies for mined areas, most notably the conservation of topsoil. Because recovering soil health following mining is a lengthy and costly process, they emphasize the importance of topsoil conservation practices – moving topsoil prior to mining and storing it separately to conserve the nutrients and seeds — so it can then be returned to the mining site when the operations are complete.
“Soil health becomes a major challenge to reforestation following mining,” says Hardy. “By saving the topsoil, you at least have some base to start with and are not starting at zero.”
The researchers also found that there are certain plant species that are better suited for surviving soil conditions that result from mining. When possible, integrating natural regeneration strategies with the purposeful reintroduction of these hardy plants, they say, makes it more likely that degraded areas can be restored to forest.
As surface mining continues to rise throughout the tropics, the authors highlight a need for continued on-the-ground restoration research to help ensure the recovery of tropical forests.
Science paper:
Land Degradation and Development
See the full article here .
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The Yale School of the Environment
Yale School of the Environment Vision and Mission
We are leading the world toward a sustainable future with cutting-edge research, teaching, and public engagement on society’s evolving and urgent environmental challenges.
Core Values
Our Mission and Vision are grounded in seven fundamental values:
Excellence: We promote and engage in path-breaking science, policy, and business models that build on a fundamental commitment to analytic rigor, data, intellectual integrity, and excellence.
Leadership: We attract outstanding students nationally and internationally and offer a pioneering curriculum that defines the knowledge and skills needed to be a 21st century environmental leader in a range of professions.
Sustainability: We generate knowledge that will advance thinking and understanding across the various dimensions of sustainability.
Community: We offer a community that finds strength in its collegiality, diversity, independence, commitment to excellence, and lifelong learning.
Diversity: We celebrate our differences and identify pathways to a sustainable future that respects diverse values including equity, liberty, and civil discourse.
Collaboration: We foster collaborative learning, professional skill development, and problem-solving — and we strengthen our scholarship, teaching, policy work, and outreach through partnerships across the university and beyond.
Responsibility: We encourage environmental stewardship and responsible behavior on campus and beyond.
Guiding Principles
In pursuit of our Mission and Vision, we:
Build on more than a century of work bringing science-based strategies, ethical considerations, and conservation practices to natural resource management.
Approach problems on a systems basis and from interdisciplinary perspectives.
Integrate theory and practice, providing innovative solutions to society’s most pressing environmental problems.
Address environmental challenges at multiple scales and settings — from local to global, urban to rural, managed to wild.
Draw on the depth of resources at Yale University and our network of alumni who extend across the world.
Create opportunities for research, policy application, and professional development through our unique centers and programs.
Provide a diverse forum to convene conversations on difficult issues that are critical to progress on sustainability.
Bring special focus on the most significant threats to a sustainable future including climate change, the corresponding need for clean energy, and the increasing stresses on our natural resources.
Statement of Environmental Policy
As faculty, staff, and students of the Yale School of the Environment, we affirm our commitment to responsible stewardship of the environment of our School, our University, the city of New Haven, and the other sites of our teaching, research, professional, and social activities.
In the course of these activities, we shall strive to:
reduce our use of natural resources;
support the sustainable production of the resources we must use by purchasing renewable, reusable, recyclable, and recycled materials;
minimize our use of toxic substances and ensure that unavoidable use is in full compliance with federal, state, and local environmental regulations;
reduce the amount of waste we generate and promote strategies to reuse and recycle those wastes that cannot be avoided;
restore the environment where possible.
Each member of the School community is encouraged to set an example for others by serving as an active steward of our environment.
Yale University is a private Ivy League research university in New Haven, Connecticut. Founded in 1701 as the Collegiate School, it is the third-oldest institution of higher education in the United States and one of the nine Colonial Colleges chartered before the American Revolution. The Collegiate School was renamed Yale College in 1718 to honor the school’s largest private benefactor for the first century of its existence, Elihu Yale. Yale University is consistently ranked as one of the top universities and is considered one of the most prestigious in the nation.
Chartered by Connecticut Colony, the Collegiate School was established in 1701 by clergy to educate Congregational ministers before moving to New Haven in 1716. Originally restricted to theology and sacred languages, the curriculum began to incorporate humanities and sciences by the time of the American Revolution. In the 19th century, the college expanded into graduate and professional instruction, awarding the first PhD in the United States in 1861 and organizing as a university in 1887. Yale’s faculty and student populations grew after 1890 with rapid expansion of the physical campus and scientific research.
Yale is organized into fourteen constituent schools: the original undergraduate college, the Yale Graduate School of Arts and Sciences and twelve professional schools. While the university is governed by the Yale Corporation, each school’s faculty oversees its curriculum and degree programs. In addition to a central campus in downtown New Haven, the university owns athletic facilities in western New Haven, a campus in West Haven, Connecticut, and forests and nature preserves throughout New England. As of June 2020, the university’s endowment was valued at $31.1 billion, the second largest of any educational institution. The Yale University Library, serving all constituent schools, holds more than 15 million volumes and is the third-largest academic library in the United States. Students compete in intercollegiate sports as the Yale Bulldogs in the NCAA Division I – Ivy League.
As of October 2020, 65 Nobel laureates, five Fields Medalists, four Abel Prize laureates, and three Turing award winners have been affiliated with Yale University. In addition, Yale has graduated many notable alumni, including five U.S. Presidents, 19 U.S. Supreme Court Justices, 31 living billionaires, and many heads of state. Hundreds of members of Congress and many U.S. diplomats, 78 MacArthur Fellows, 252 Rhodes Scholars, 123 Marshall Scholars, and nine Mitchell Scholars have been affiliated with the university.
Research
Yale is a member of the Association of American Universities and is classified among “R1: Doctoral Universities – Very high research activity”. According to the National Science Foundation , Yale spent $990 million on research and development in 2018, ranking it 15th in the nation.
Yale’s faculty include 61 members of the National Academy of Sciences , 7 members of the National Academy of Engineering and 49 members of the American Academy of Arts and Sciences . The college is, after normalization for institution size, the tenth-largest baccalaureate source of doctoral degree recipients in the United States, and the largest such source within the Ivy League.
Yale’s English and Comparative Literature departments were part of the New Criticism movement. Of the New Critics, Robert Penn Warren, W.K. Wimsatt, and Cleanth Brooks were all Yale faculty. Later, the Yale Comparative literature department became a center of American deconstruction. Jacques Derrida, the father of deconstruction, taught at the Department of Comparative Literature from the late seventies to mid-1980s. Several other Yale faculty members were also associated with deconstruction, forming the so-called “Yale School”. These included Paul de Man who taught in the Departments of Comparative Literature and French, J. Hillis Miller, Geoffrey Hartman (both taught in the Departments of English and Comparative Literature), and Harold Bloom (English), whose theoretical position was always somewhat specific, and who ultimately took a very different path from the rest of this group. Yale’s history department has also originated important intellectual trends. Historians C. Vann Woodward and David Brion Davis are credited with beginning in the 1960s and 1970s an important stream of southern historians; likewise, David Montgomery, a labor historian, advised many of the current generation of labor historians in the country. Yale’s Music School and Department fostered the growth of Music Theory in the latter half of the 20th century. The Journal of Music Theory was founded there in 1957; Allen Forte and David Lewin were influential teachers and scholars.
In addition to eminent faculty members, Yale research relies heavily on the presence of roughly 1200 Postdocs from various national and international origin working in the multiple laboratories in the sciences, social sciences, humanities, and professional schools of the university. The university progressively recognized this working force with the recent creation of the Office for Postdoctoral Affairs and the Yale Postdoctoral Association.
Notable alumni
Over its history, Yale has produced many distinguished alumni in a variety of fields, ranging from the public to private sector. According to 2020 data, around 71% of undergraduates join the workforce, while the next largest majority of 16.6% go on to attend graduate or professional schools. Yale graduates have been recipients of 252 Rhodes Scholarships, 123 Marshall Scholarships, 67 Truman Scholarships, 21 Churchill Scholarships, and 9 Mitchell Scholarships. The university is also the second largest producer of Fulbright Scholars, with a total of 1,199 in its history and has produced 89 MacArthur Fellows. The U.S. Department of State Bureau of Educational and Cultural Affairs ranked Yale fifth among research institutions producing the most 2020–2021 Fulbright Scholars. Additionally, 31 living billionaires are Yale alumni.
At Yale, one of the most popular undergraduate majors among Juniors and Seniors is political science, with many students going on to serve careers in government and politics. Former presidents who attended Yale for undergrad include William Howard Taft, George H. W. Bush, and George W. Bush while former presidents Gerald Ford and Bill Clinton attended Yale Law School. Former vice-president and influential antebellum era politician John C. Calhoun also graduated from Yale. Former world leaders include Italian prime minister Mario Monti, Turkish prime minister Tansu Çiller, Mexican president Ernesto Zedillo, German president Karl Carstens, Philippine president José Paciano Laurel, Latvian president Valdis Zatlers, Taiwanese premier Jiang Yi-huah, and Malawian president Peter Mutharika, among others. Prominent royals who graduated are Crown Princess Victoria of Sweden, and Olympia Bonaparte, Princess Napoléon.
Yale alumni have had considerable presence in U.S. government in all three branches. On the U.S. Supreme Court, 19 justices have been Yale alumni, including current Associate Justices Sonia Sotomayor, Samuel Alito, Clarence Thomas, and Brett Kavanaugh. Numerous Yale alumni have been U.S. Senators, including current Senators Michael Bennet, Richard Blumenthal, Cory Booker, Sherrod Brown, Chris Coons, Amy Klobuchar, Ben Sasse, and Sheldon Whitehouse. Current and former cabinet members include Secretaries of State John Kerry, Hillary Clinton, Cyrus Vance, and Dean Acheson; U.S. Secretaries of the Treasury Oliver Wolcott, Robert Rubin, Nicholas F. Brady, Steven Mnuchin, and Janet Yellen; U.S. Attorneys General Nicholas Katzenbach, John Ashcroft, and Edward H. Levi; and many others. Peace Corps founder and American diplomat Sargent Shriver and public official and urban planner Robert Moses are Yale alumni.
Yale has produced numerous award-winning authors and influential writers, like Nobel Prize in Literature laureate Sinclair Lewis and Pulitzer Prize winners Stephen Vincent Benét, Thornton Wilder, Doug Wright, and David McCullough. Academy Award winning actors, actresses, and directors include Jodie Foster, Paul Newman, Meryl Streep, Elia Kazan, George Roy Hill, Lupita Nyong’o, Oliver Stone, and Frances McDormand. Alumni from Yale have also made notable contributions to both music and the arts. Leading American composer from the 20th century Charles Ives, Broadway composer Cole Porter, Grammy award winner David Lang, and award-winning jazz pianist and composer Vijay Iyer all hail from Yale. Hugo Boss Prize winner Matthew Barney, famed American sculptor Richard Serra, President Barack Obama presidential portrait painter Kehinde Wiley, MacArthur Fellow and contemporary artist Sarah Sze, Pulitzer Prize winning cartoonist Garry Trudeau, and National Medal of Arts photorealist painter Chuck Close all graduated from Yale. Additional alumni include architect and Presidential Medal of Freedom winner Maya Lin, Pritzker Prize winner Norman Foster, and Gateway Arch designer Eero Saarinen. Journalists and pundits include Dick Cavett, Chris Cuomo, Anderson Cooper, William F. Buckley, Jr., and Fareed Zakaria.
In business, Yale has had numerous alumni and former students go on to become founders of influential business, like William Boeing (Boeing, United Airlines), Briton Hadden and Henry Luce (Time Magazine), Stephen A. Schwarzman (Blackstone Group), Frederick W. Smith (FedEx), Juan Trippe (Pan Am), Harold Stanley (Morgan Stanley), Bing Gordon (Electronic Arts), and Ben Silbermann (Pinterest). Other business people from Yale include former chairman and CEO of Sears Holdings Edward Lampert, former Time Warner president Jeffrey Bewkes, former PepsiCo chairperson and CEO Indra Nooyi, sports agent Donald Dell, and investor/philanthropist Sir John Templeton.
Yale alumni distinguished in academia include literary critic and historian Henry Louis Gates, economists Irving Fischer, Mahbub ul Haq, and Nobel Prize laureate Paul Krugman; Nobel Prize in Physics laureates Ernest Lawrence and Murray Gell-Mann; Fields Medalist John G. Thompson; Human Genome Project leader and National Institutes of Health director Francis S. Collins; brain surgery pioneer Harvey Cushing; pioneering computer scientist Grace Hopper; influential mathematician and chemist Josiah Willard Gibbs; National Women’s Hall of Fame inductee and biochemist Florence B. Seibert; Turing Award recipient Ron Rivest; inventors Samuel F.B. Morse and Eli Whitney; Nobel Prize in Chemistry laureate John B. Goodenough; lexicographer Noah Webster; and theologians Jonathan Edwards and Reinhold Niebuhr.
In the sporting arena, Yale alumni include baseball players Ron Darling and Craig Breslow and baseball executives Theo Epstein and George Weiss; football players Calvin Hill, Gary Fenick, Amos Alonzo Stagg, and “the Father of American Football” Walter Camp; ice hockey players Chris Higgins and Olympian Helen Resor; Olympic figure skaters Sarah Hughes and Nathan Chen; nine-time U.S. Squash men’s champion Julian Illingworth; Olympic swimmer Don Schollander; Olympic rowers Josh West and Rusty Wailes; Olympic sailor Stuart McNay; Olympic runner Frank Shorter; and others.
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