In a new thesis from Uppsala University, Simon Davidsson shows that a rapid expansion of renewable energy technology is not necessarily sustainable. To find the best way forward in the coming transition towards renewable energy, he posits, that we need to take account of the materials used and make sure the industries that emerge are sustainable.
The thesis “Natural resources and sustainable energy,” is the first thesis in the new field of doctoral education ‘Natural resources and sustainable development’ at the department of earth sciences, studies. It discusses how these technologies are to be replaced when they reach their end life.
It says “Renewable energy technology can lead to reduced emission of greenhouse gases, but for a complete analysis, we need to make sure that the whole production chain is sustainable. Depending on the technologies we choose, the demand for different materials and elements, which may come from more or less rare resources, will increase.
For instance, it is not obvious that the production of wind turbines and solar cells is sustainable, that the materials have been sourced in a sustainable way, or that the industries are capable of recycling the technology in the future,” says Simon Davidsson, new PhD at Uppsala University. The extraction of these resources creates environmental problems, usually in other parts of the world, and their future availability is often uncertain. (Salar de Uyuni in Bolivia is the world’s largest salt flat. The salt contains large amounts of lithium, which is a key component in modern batteries.) But while the energy is renewable, every solar panel and wind turbine is largely made from non-renewable resources.
“To assess the feasibility and consequences of a global energy transition, we need to consider material flows and how sustainable emerging industries are with regard to aspects other than climate. Truly sustainable energy systems require the creation of sustainable industries, which not only can produce large amounts of renewable energy technology, but also maintain a working system on a longer time scale, and do so in a resource efficient way,” says Simon Davidsson.