Uploaded on 2017-01-25 by Maitane Iruretagoyena

The most important stocks and flows entering, staying in and eventually leaving Boston area are: - Energy: The energy is transported to the city, one part of it is used and the other follows another place to be used. - Students: Students that came to the universities stay in the city and after finishing their studies, most of them left the city looking for jobs opportunities. - Birds: The birds travel all over the world looking for the right climate place and when they find it they stay temporarily. Then they left the city and move to another one.