City governments can have a great impact on reducing carbon emissions. Such activities as reducing traffic congestion, improving transit efficiency, providing safer walking/biking routes, and more, can help citizens move more efficiently.
This would not only reduce carbon emissions, but make the city more 'livable' and probably improve citizen satisfaction. Read this article and check out their link to the project six major European cities have undertaken to try to use advanced technology (including Artificial Intelligence) to meet these objectives.
“Cities and regions have a lot to say and do when it comes to climate action,” said Kaisa Sibelius, coordinator of the AI4Cities project. “We are very well placed to support our national governments in achieving the climate goals. AI4Cities shows our leadership and our willingness to use the power of pre-commercial procurement to boost innovation, artificial intelligence and sustainability in Europe."