A concerted worldwide effort to reach the goals of the Paris Agreement, i.e., climate stabilisation to well below +2°C above pre-industrial levels, and decarbonisation until mid-century, brings about a substantial increase in raw material demand for clean energy technologies. Yet, energy...

Flaaten’s (1991) study on competing species conjectures that a higher price (harvesting costs) of one species yields a lower (greater) own stock-size and a greater (lower) stock-size of the competing species. I show both conjectures are wrong.