When it rains, it's porous: Why paving with pervious concrete
matters November 07, 2007 They paved paradise And put up a
parking lot. It's still true that "You don't know what you've
got till it's gone." Yet, environmental concerns, including
questions about what we as individuals and communities can do to
make a difference, have only increased in number and complexity
since Joni Mitchell penned her anthem of loss, “Big Yellow
Taxi.” Some choices are simple. One choice in particular can
make lasting, if invisible, environmental improvements in all of
our communities and in the world: Choosing to pave paradise with
pervious concrete, a fairly new form of that most ancient of
natural building materials, may just help save it. Pervious
concrete is a term that applies to various blends of Portland
cement, aggregates, admixtures, and water yet typically very few
(if any) “fines,” or sand and other fine particles. Once placed
and hardened, pervious concrete creates a hard, durable paving
with permanent interior air