Green infrastructure is about infrstructure that loves and cares for the planet.  

Carl Sagan: "Cherish the pale blue dot, the only home we've ever known"

Green infrastructure is the priority for innovations in infrastructure.

-don't forget the ones already pioneered, waiting for the patent process

Related, there is also Hyper-natural by Blaine Brownell and Marc Swackhamer from Architecture Briefs The foundations of Architecture, published by Princeton Architectural Press.