What do green walls do?

  • 1 Replies

0 Members and 1 Guest are viewing this topic.


Offline thedoc

  • Forum Admin
  • Administrator
  • Sr. Member
  • *****
  • 513
    • View Profile
What do green walls do?
« on: 01/05/2014 06:30:01 »
When talking about sustainable architecture you listen about green walls and roofs and urban agriculture. It's claimed that plants absorb the CO2 and the pollutants from the atmosphere, wouldn't it be the same for the crops that we will later eat?
Asked by Maria Gabriella

                                        Visit the webpage for the podcast in which this question is answered.
[chapter podcast=1000679 track=14.04.29/Naked_Scientists_Show_14.04.29_1002248.mp3]  ...or Listen to the Answer[/chapter] or [download as MP3]
« Last Edit: 01/05/2014 06:30:01 by _system »


Offline CliffordK

  • Neilep Level Member
  • ******
  • 6321
  • Site Moderator
    • View Profile
Re: What do green walls do?
« Reply #1 on: 01/05/2014 09:14:30 »
There are buildings with plants growing on the roof or a "green roof".  It may well help absorb some pollutants.  As far as carbon sequestration, it all depends on what happens to the plant matter, but it just grows, dies, decomposes, and regrows, then any carbon captured would become part of a cycle, with no increasing net sequestration. 

One might be able to grow crops on the roof, again generally with an annual cycle for the CO2, unless somehow the organic matter is buried deep below the surface of the earth.