How green technologies can harm the environment: the other side of the coin
· 10 min read
Wind turbines, solar panels and electric vehicles have become symbols of the clean energy transition. They offer a credible path away from fossil fuels and towards lower-carbon economies. But the transition also has a material side: blades, panels, batteries, metals, mining, logistics and waste.
The core problem is not that green technologies are "bad". It is that many of them were scaled faster than the systems needed to recycle, reuse and govern them. The next phase of the energy transition will therefore be judged not only by how much clean power it produces, but also by how circular, traceable and responsible its supply chains become.
In 2019, photos from a landfill near Casper, Wyoming, spread widely online. They showed piles of decommissioned wind turbine blades waiting to be buried underground. More than a thousand huge blades were reportedly stored at the site, with each blade over 40 metres long – roughly half the length of a football pitch.
The images triggered a wave of criticism. Wind power produces low-carbon electricity, but the sector had not yet built a fully circular system for dealing with one of its most difficult waste streams. In some cases, blades were buried with the idea that they could be stored until better recycling methods became commercially available.
A wind turbine typically operates for around 20–25 years. For the first generation of modern wind farms, end-of-life management is now becoming a real issue. Most of a turbine is not the problem: steel, concrete and electrical components can generally be recycled. The blades are different. They are usually made from glass fibre, carbon fibre, resins and polymers – materials designed to be strong, light and durable. Those same qualities make them difficult to separate and recycle.
The scale is growing quickly. According to Ember, clean power – renewables plus nuclear – surpassed 40% of global electricity generation in 2024, with renewables adding a record 858 TWh of generation that year. That growth is essential for decarbonisation, but it also means more equipment will eventually reach end of life.
A widely cited study estimated that global wind turbine blade waste could reach around 43 million tonnes by 2050, with Europe accounting for about a quarter of the total.
Europe is already trying to move away from landfill. WindEurope says around 90% of a turbine's mass can be recycled through established waste-management practices, but blades remain the main challenge. The European wind industry has committed to a self-imposed landfill ban for decommissioned wind turbine blades from 1 January 2026. WindEurope estimates that Europe's decommissioned blade material could rise from around 20,000 tonnes in 2025 to 55,000 tonnes per year by 2030.
Several companies are now working on solutions. Danish manufacturer Vestas has developed a chemical process that can break down epoxy-based turbine blades and recover materials for use in new blades. The technology is designed to work with existing blade designs, which is important because many already-installed turbines were not created with circularity in mind.
Researchers are also experimenting with entirely new blade materials. Some teams are testing bio-based composites, including structures made from fungal mycelium, organic substrates and bamboo. Others are developing recyclable resins that could be broken down chemically at the end of a turbine's life.
One particularly memorable experiment came from researchers working on a composite resin that could be recycled into new turbine material – or converted into potassium lactate, a purified ingredient that can be used in food products such as sweets and sports drinks. The point is not that old wind blades will become candy at scale. The point is that designers are starting to think about end-of-life chemistry before the product is built.
Solar power is one of the fastest-growing energy technologies in the world. It is also material-intensive. A solar panel contains glass, aluminium, silicon, copper, silver and, depending on the technology, small amounts of potentially hazardous substances such as lead or cadmium.
The issue is not ordinary operation. The problem appears at the end of life, especially when panels are broken, poorly transported or dumped instead of recycled. Solar panels are bulky and fragile. Safe removal, transport and treatment require trained workers and specialised facilities. Without that, panels can break and release hazardous substances into local environments.
Most panel mass is technically recyclable, but economics often stand in the way. Recycling has historically been much more expensive than landfill. Harvard Business Review estimated that recycling one panel could cost around $20–30, compared with only $1–2 for landfill disposal.
This is why the solar industry faces a circularity gap. It has become highly effective at producing cheap clean electricity, but it is still building the systems needed to handle millions of tonnes of retired panels.
Estimates vary, but IRENA and IEA PVPS previously projected that cumulative solar PV waste could reach 60–78 million tonnes by 2050. More recent industry assessments suggest the figure could be higher if early replacement and rapid deployment continue.
Solar panel recycling is not yet an easy business model. A panel contains valuable materials such as silver, copper and silicon, but often in small quantities and in forms that are difficult to extract. The recovered value may not cover the full cost of collection, logistics and processing.
Still, Europe is moving faster than many other regions. Under the EU's Waste Electrical and Electronic Equipment framework, solar modules are treated as electrical waste, and the policy logic is based on extended producer responsibility: manufacturers and importers must help finance collection and recycling. The European Commission also highlights that recycling critical raw materials from electronic waste can strengthen resource efficiency and Europe's strategic autonomy.
France has become one of the most visible examples. ROSI, a French solar recycling company, inaugurated an industrial recycling line in 2023 that focuses on recovering high-purity materials from end-of-life panels. The company says its technology can recover valuable materials such as silver, copper and silicon, and its French line was selected to recycle panels collected in France.
In the United States, companies such as SOLARCYCLE are also trying to industrialise high-recovery recycling. The company says its process can extract up to 95% of a panel's value, including aluminium, silver, silicon and glass.
The key policy lesson is simple: without clear recycling obligations, landfill remains cheaper. With producer responsibility, recycling targets and better infrastructure, solar waste can become a source of secondary raw materials rather than a future environmental burden.
Electric vehicles are one of the most important climate technologies in transport. According to the International Energy Agency, global electric car sales exceeded 17 million in 2024, reaching more than 20% of new car sales worldwide. The IEA expects the EV share of car sales to exceed 40% by 2030 under today's policy settings.
In Europe, EVs are central to climate policy. The European Environment Agency notes that electric vehicles already tend to have lower life-cycle greenhouse gas emissions than petrol and diesel cars, though the advantage depends strongly on the electricity mix. As power systems become cleaner, the emissions advantage of EVs should grow further.
But electric vehicles are not impact-free. Their environmental footprint shifts from tailpipe emissions to batteries, electricity generation, mining and end-of-life treatment.
If an EV is charged on a coal-heavy grid, its climate benefit is smaller. If it is charged with low-carbon electricity, the benefit is much larger. This is why the decarbonisation of electricity and the electrification of transport must happen together.
Most electric vehicles use lithium-ion batteries. These batteries require materials such as lithium, nickel, cobalt, manganese, copper and graphite. Mining and processing these materials can create environmental and social risks.
Cobalt is one of the most sensitive examples. A large share of global cobalt production comes from the Democratic Republic of Congo, where concerns have been raised about unsafe working conditions, informal mining and child labour in parts of the supply chain. Lithium extraction can also create pressure on water resources, especially in salt-flat regions of Argentina, Bolivia and Chile.
This does not mean that fossil-fuel vehicles are cleaner. Oil extraction, refining and combustion also create major environmental and geopolitical harms. But it does mean that the EV transition needs stronger supply-chain due diligence, better battery chemistry, more responsible sourcing and far higher recycling rates.
EV batteries can last for many years. A typical battery may remain useful for 10–20 years depending on chemistry, driving patterns, climate and charging behaviour. After that, it should not simply be treated as waste. Battery packs contain valuable materials: cobalt, nickel, lithium, copper and aluminium can often be recovered and reused.
The problem is design complexity. Battery packs vary widely across manufacturers. They differ in cell chemistry, shape, bonding methods, module structure, safety systems and software. Many are not designed for easy disassembly, either by humans or robots.
Current recycling methods often rely on shredding and high-temperature or chemical processing. These methods can recover metals, but they can be energy-intensive and may produce lower-quality recovered materials. More efficient recycling will require better labelling, standardisation, battery passports and design-for-disassembly.
Europe is moving in this direction. The EU Batteries Regulation sets recycling efficiency and material recovery targets. By the end of 2027, recyclers must recover 90% of cobalt, copper, lead and nickel and 50% of lithium from waste batteries. By the end of 2031, these targets rise to 95% for cobalt, copper, lead and nickel and 80% for lithium.
Automakers are also building recycling capacity. Volkswagen opened a battery recycling pilot plant in Salzgitter. Tesla has integrated battery recycling into its battery production ecosystem. Nissan and Sumitomo created 4R Energy to reuse and repurpose EV batteries, including for stationary storage.
Wind turbines, solar panels and electric vehicles are essential for decarbonisation. They reduce fossil-fuel use, cut operational emissions and help build a cleaner energy system. But they also show that "green" technologies can create new environmental pressures if circularity is treated as an afterthought.
The next phase of the transition needs three things.
First, products must be designed for repair, reuse and recycling from the beginning. A turbine blade, solar panel or battery should not become a recycling puzzle after 25 years.
Second, recycling must be economically viable. That means regulation, producer responsibility, subsidies where needed and stable markets for recovered materials.
Third, climate policy must look beyond operational emissions. A truly sustainable technology must account for its full life cycle: raw materials, manufacturing, transport, use, maintenance, recycling and final disposal.
The energy transition is still the right direction. But the cleaner economy will not be built by replacing one linear system with another. It will be built when clean technologies also become circular technologies.
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