The
topic is global, cities all over the
world are affected, participate from
the start to the green lung.
Interplay between the built-up area
and the natural zone, concepts of
greening are required as well as
city planners willing to plan, who
understand meaningfully and to green
more despite all the economy. The
consequence is that more and more
people live in cities. But which
cities are growing exactly and how
strongly - that is hardly
predictable.
