Extended Data Fig. 1: Map of GHG emissions of aluminum smelters in 2021.
From: Different technology packages for aluminium smelters worldwide to deliver the 1.5 °C target

The emissions intensity (in tCO2e/t Al) of smelters are represented by the dot inner color. The outer color of the dots indicates the composition of smelter’s electricity sources, including coal- or gas-based captive power plants, purchased electricity from the grid, and a mixture of the two. Smelter’s total GHG emissions (in Mt CO2e) are represented by the size of the dot.