The document discusses the renewable energy transition's impact on battery and strategic metal markets. It notes that increased demand for renewables and energy storage is creating new opportunities for metals but also straining supply chains. Some metals like rare earths are becoming "critical" due to potential restrictions on production from geopolitical, environmental or social factors. While mining companies and investors initially piled into battery and energy metals markets, growth has been uneven and some companies have faced failures or bankruptcies. The document examines evidence of past transformative metal market growth and considers which energy metals may have the most potential for growth but also the least constraints, though environmental and social issues add further complexity to projections.