A collection of methods (relying on the scikit-mobility and OSMnx Python libraries) to compute emissions starting from vehicles' mobility trajectories. In particular, methods have been developed to: - map-matching: match points of a TrajDataFrame to the edges (roads) or nodes (crossroads) of a road network took from OpenStreetMap; - speed/acceleration computation: compute the values of speed and acceleration in each point of the TrajDataFrame; - trajectory time filtering: filter the points of the TrajDataFrame s.t. the time interval between the points of the resulting sub-trajectories is not greater than a threshold; - computation of emissions: compute the instantaneous emissions of 4 air pollutants (CO2, NOx, PM, VOC) in each point of the TrajDataFrame. The methods are available in a GitHub Repository (https://github.com/matteoboh/mobility_emissions)