Transmission spectrum models for four different atmospheric metallicities: solar (green, same as the green line in Figure 5; “1× Solar”) and 10 times (blue; “10 × solar”), 100 times (red; “100 × solar”), and 1000 times (purple; “1000 × solar”) higher than solar. The thick and thin lines represent the spectra of the haze-covered and haze-free atmospheres, respectively. Note that the transmission spectrum models are smoothed for clarity.