Most of the students I've met get to school by metro, and if they live far away in another town, they also use the bus. The bus costs around $1 USD per ride, which is cheaper for students than driving. This helps the environment but it's also part of the culture here, because even people who have cars usually prefer to take the metro. There are options to pay 15 euros a month to use your metro card unlimited times, so it is very convenient to pay for the monthly pass.
