Renewable energy technologies, while often labeled as clean or net-zero alternatives to fossil fuels, involve substantial use of critical minerals in products like electric vehicles, solar panels, wind turbines, and battery storage systems. This aspect is frequently underappreciated, yet studies indicate it could be a significant area of environmental impact. For instance, research has shown that a typical electric vehicle needs around six times the mineral resources of a conventional vehicle, while an onshore wind turbine requires nine times the mineral input compared to a gas power plant of similar capacity. This paper seeks to analyze the environmental effects linked to the critical minerals required by certain renewable energy technologies. The study begins with an estimation of the future megawatt capacities for each type of renewable technology. Next, it calculates the specific mineral quantities necessary for each model, followed by an assessment of the environmental repercussions tied to their extraction and processing. The results highlight the unique environmental challenges posed by the rising demand for minerals in solar and wind energy systems, taking into account various adoption scenarios.
References
[1]
Carrara, S., Alves Dias, P., Pavel, C. and Bertoldi, P. (2020) Raw Materials Demand for Wind and Solar PV Technologies in the Transition towards a Decarbonised Energy System. European Commission Joint Research Centre (JRC).
[2]
Swami, G., Sheth, K. and Patel, D. (2024) PV Capacity Evaluation Using ASTM E2848: Techniques for Accuracy and Reliability in Bifacial Systems. Smart Grid and Renewable Energy, 15, 201-216. https://doi.org/10.4236/sgre.2024.159012
[3]
Sheth, K. and Patel, D. (2024) Strategic Placement of Charging Stations for Enhanced Electric Vehicle Adoption in San Diego, California. Journal of Transportation Technologies, 14, 64-81. https://doi.org/10.4236/jtts.2024.141005
[4]
Sheth, K. and Patel, D. (2024) Comprehensive Examination of Solar Panel Design: A Focus on Thermal Dynamics. Smart Grid and Renewable Energy, 15, 15-33. https://doi.org/10.4236/sgre.2024.151002
[5]
International Energy Agency (IEA) (2021) The Role of Critical Minerals in Clean Energy Transitions. IEA. https://www.iea.org/reports/the-role-of-critical-minerals-in-clean-energy-transitions
[6]
International Energy Agency (IEA) (2023) Tripling Renewable Power Capacity by 2030 Is Vital to Keep the 1.5°C Goal within Reach. IEA. https://www.iea.org/commentaries/tripling-renewable-power-capacity-by-2030-is-vital-to-keep-the-150c-goal-within-reach
[7]
International Energy Agency (IEA) (2017) Energy Technology Perspectives 2017. IEA. https://www.iea.org/reports/energy-technology-perspectives-2017
[8]
Cabernard, L. and Pfister, S. (2022) Hotspots of Mining-Related Biodiversity Loss in Global Supply Chains and the Potential for Reduction through Renewable Electricity. Environmental Science & Technology, 56, 16357-16368. https://doi.org/10.1021/acs.est.2c04003
[9]
Murakami, S., Takasu, T., Islam, K., Yamasue, E. and Adachi, T. (2020) Ecological Footprint and Total Material Requirement as Environmental Indicators of Mining Activities: Case Studies of Copper Mines. Environmental and Sustainability Indicators, 8, Article ID: 100082. https://doi.org/10.1016/j.indic.2020.100082
[10]
Månberger, A. and Stenqvist, B. (2018) Global Metal Flows in the Renewable Energy Transition: Exploring the Effects of Substitutes, Technological Mix and Development. Energy Policy, 119, 226-241. https://doi.org/10.1016/j.enpol.2018.04.056
[11]
Pavel, C.C., Lacal-Arántegui, R., Marmier, A., Schüler, D., Tzimas, E., Buchert, M., et al. (2017) Substitution Strategies for Reducing the Use of Rare Earths in Wind Turbines. Resources Policy, 52, 349-357. https://doi.org/10.1016/j.resourpol.2017.04.010
[12]
Department of Energy (DOE) (2019) Advanced Wind Turbine Drivetrain Trends and Opportunities. Office of Energy Efficiency & Renewable Energy. https://www.energy.gov/eere/articles/advanced-wind-turbine-drivetrain-trends-and-opportunities
[13]
SolarTown (2021) Solar Panels: Thin Film or Crystalline. https://solartown.com/learning/solar-panels/solar-panels-thin-film-or-crystalline
[14]
Vestas Wind Systems A/S (2014) Life Cycle Assessment of Electricity Production from an Onshore V117-3.3 MW Wind Plant. Version 1.0.
[15]
Vestas Wind Systems A/S (2018) Life Cycle Assessment of Electricity Production from an Onshore V120-2.0 MW Wind Plant. Version 1.1.
[16]
Nunez, P. and Jones, S. (2015) Cradle to Gate: Life Cycle Impact of Primary Aluminium Production. The International Journal of Life Cycle Assessment, 21, 1594-1604. https://doi.org/10.1007/s11367-015-1003-7
[17]
Haque, N. and Norgate, T. (2013) Estimation of Greenhouse Gas Emissions from Ferroalloy Production Using Life Cycle Assessment with Particular Reference to Australia. Journal of Cleaner Production, 39, 220-230. https://doi.org/10.1016/j.jclepro.2012.08.010
[18]
Northey, S., Haque, N. and Mudd, G. (2013) Using Sustainability Reporting to Assess the Environmental Footprint of Copper Mining. Journal of Cleaner Production, 40, 118-128. https://doi.org/10.1016/j.jclepro.2012.09.027
[19]
Westfall, L.A., Davourie, J., Ali, M. and McGough, D. (2016) Cradle-to-Gate Life Cycle Assessment of Global Manganese Alloy Production. The International Journal of Life Cycle Assessment, 21, 1573-1579. https://doi.org/10.1007/s11367-015-0995-3
[20]
Heidari, S.M. and Anctil, A. (2022) Country-specific Carbon Footprint and Cumulative Energy Demand of Metallurgical Grade Silicon Production for Silicon Photovoltaics. Resources, Conservation and Recycling, 180, Article ID: 106171. https://doi.org/10.1016/j.resconrec.2022.106171
[21]
Farjana, S.H., Huda, N., Mahmud, M.A.P. and Lang, C. (2019) Impact Analysis of Gold Silver Refining Processes through Life-Cycle Assessment. Journal of Cleaner Production, 228, 867-881. https://doi.org/10.1016/j.jclepro.2019.04.166