Several articles and reports published recently have re-visited the question: how “clean” is “clean energy”? Here is a selection, beginning in October 2020 with a multi-part series titled Recycling Clean Energy Technologies , from the Union of Concerned Scientists. It includes: “Wind Turbine blades don’t have to end up in landfill”; “Cracking the code on recycling energy storage batteries“; and “Solar Panel Recycling: Let’s Make It Happen” .
“The glaring problem with Canada’s solar sector and how to fix it” (National Observer, Nov. 2020) states that “While solar is heralded as a clean, green source of renewable energy, this is only true if the panels are manufactured sustainably and can be recycled and kept out of landfills.” Yet right now, Canada has no capacity to recycle the 350 tonnes of solar pv waste produced in 2016 alone, let alone the 650,000 tonnes Canada is expected to produce by 2050. The author points the finger of responsibility at Canadian provinces and territories, which are responsible for waste management and extended producer responsibility (EPR) regulations. A description of solar recycling and waste management systems in Europe and the U.S. points to better practices.
“No ‘green halo’ for renewables: First Solar, Veolia, others tackle wind and solar environmental impacts” appeared in Utility Drive (Dec. 14) as a “long read” discussion of progress to uphold environmental and health and safety standards in both the production and disposal of solar panels and wind turbine blades. The article points to examples of industry standards and third-party certification of consumer goods, such as The Green Electronics Council (GEC) and NSF International. The article also quotes experts such as University of California professor Dustin Mulvaney, author of Solar Power: Innovation, Sustainability, and Environmental Justice (2019) and numerous other articles which have tracked the environmental impact, and labour standards, of the solar energy industry.
Regarding the recycling of wind turbine blades: A press release on December 8 2020 describes a new agreement between GE Renewable Energy and Veolia, whereby Veolia will recycle blades removed from its U.S.-based onshore wind turbines by shredding them at a processing facility in Missouri, so that they can be used as a replacement for coal, sand and clay in cement manufacturing. A broader article appeared in Grist, “Today’s wind turbine blades could become tomorrow’s bridges” (Jan. 8 2021) which notes the GE- Veoli initiative and describes other emerging and creative ways to deal with blade waste, such as the Re-Wind project. Re-Wind is a partnership involving universities in the U.S., Ireland, and Northern Ireland who are engineering ways to repurpose the blades for electrical transmission towers, bridges, and more. The article also quotes a senior wind technology engineer at the National Renewable Energy Laboratory in the U.S. who is experimenting with production materials to find more recyclable materials from which to build wind turbine blades in the first place. He states: “Today, recyclability is something that is near the top of the list of concerns” for wind energy companies and blade manufacturers alike …. All of these companies are saying, ‘We need to change what we’re doing, number one because it’s the right thing to do, number two because regulations might be coming down the road. Number three, because we’re a green industry and we want to remain a green industry.’”
These are concerns also top of mind regarding the electric vehicle industry, where both production and recycling of batteries can be detrimental to the planet. The Battery Paradox: How the electric vehicle boom is draining communities and the planet is a December 2020 report by the Dutch Centre for Research on Multinational Corporations (SOMO). It reviews the social and environmental impacts of the whole battery value chain, (mining, production, and recycling) and the mining of key minerals used in Lithium-ion batteries (lithium, cobalt, nickel, graphite and manganese). The report concludes that standardization of battery cells, modules and packs would increase recycling rates and efficiency, but ultimately, “To relieve the pressure on the planet, …. any energy transition strategy should prioritize reducing demand for batteries and cars… Strategies proposed include ride-sharing, car-sharing and smaller vehicles.”