Comparison between correlation coefficients (symbols with error bars) and component separation results (shaded areas) for free-free emission (top) and dust emission (bottom). For free-free emission we show the Dickinson et al. (2003) Hα correlation coefficients and for dust emission the Finkbeiner et al. (1999) correlation coefficients. The grey area in the bottom panel is the sum of the AME (blue) and thermal dust (red) components. The dash-dotted line in both panels shows the 1σ error due to the chance correlation of CMB with foreground templates, estimated using simulations.