Authors:

Children are a kind of indicator species. If we can build a successful city for children, we will have a successful city for all people.

"Cities debate: teenagers talk London, New York, Johannesburg and Rio" by Carlene Thomas-Bailey, www.theguardian.com. January 29, 2014.
Children are a kind of indicator species. If we can build a successful city for children, we will have a successful city for all people.