Local vs. global star-forming environment. Blue squares and open-circles show the SNe Ia from locally star-forming and passive regions, respectively (log (Σ_Hα) ≷ 38.35, blue-dotted line). Gray arrows indicate points with Σ_Hα signals compatible with zero (detection at less than 2σ). The red-dashed line indicates the limit that is commonly used to distinguish between star-forming and passive galaxies when using global host galaxy measurements (log (sSFR) ≷ −10.5). Three SNe Ia from our sample do not have sSFR measurements.