Emissions from vehicles are contributing to the buildup of CO2 in our atmosphere. This has been linked to climate change, which is obviously a big deal - most of us are aware of it by now and this is just one step towards tackling it.
Alongside climate change, there's also poor air quality and traffic buildup.
Cities that see people using their bicycles to get around also tend to build infrastructure to suit them. This can lead to better cycle routes making the journeys faster and safer.