Fig. 2
From: The trilemma of sustainable industrial growth: evidence from a piloting OECD’s Green city
Illustrations of the relationship between the average industrial firm size and air pollutions. 1. The U-shaped relationship between average industrial firm size and the amount of falling dust. 2. The U-shaped relationship between average industrial firm size and the concentration of Ox. 3. The inverted N-shaped relationship between average industrial firm size and the concentration of NO2. 4. The inverted N-shaped relationship between average industrial firm size and the concentration of CO.
