The observations of the ISAC-CNR station of Monte Cimone, part of the GAW (Global Atmosphere Watch) network, have been used for the preparation of a press release by the WMO (World Meteorological Organization): it is too early to draw definitive conclusions on the importance of decreases recorded in March 2020 as regards concentrations of greenhouse gases, but be careful of the post-crisis and not to forget Climate Actions. The preliminary observations of Monte Cimone indicate average values lower than those of the previous years both for fine particulate matter and for ozone, but there are many issues to consider to define a quantitative assessment of the impact of the decreased emissions on concentrations at Monte Cimone.