The time-series chart for your region can show high-level trends in emissions over time such as the decrease in electricity emissions as a result of more renewable energy sources entering the electricity grid. It can also show the impacts of major events such as the Covid-19 pandemic on transport emissions.
We do not recommend using the time-series chart for monitoring the impacts of individual emissions reduction programs. It is unlikely that the scale of impact from a council or community lead program will be great enough to impact the profile beyond the margin of error always present in modelling i.e. it is most likely the changes you see are not the result of your program but of other external factors.