Two-colour maps of the YSO-G29 region. In green is displayed the ¹²CO, ¹³CO, and C¹⁸O J=2−1 emissions integrated along the whole frequency/velocity range in which each line extends as presented in Fig. 9. The Ks emission obtained with NIRI-Gemini is shown in red. White contours represent the continuum emission at 1.3 mm (same levels as Fig. 8), and blue contours are the continuum emission at 10 GHz (same levels as Fig. 8). The units of the colour bars at the right of each image are Jy beam⁻¹ km s⁻¹ and correspond to the green colour of the maps. The rms noise level of the molecular integrated emission is about 0.15 Jy beam⁻¹ km s⁻¹ for the three maps.