Innovation in urban farming by means of LED lights en hydro growing in empty office and factory spaces, still experimental

http://www.vmt.nl/nieuws/vmt-nieuws/2012/telen-onder-led-licht-wordt-gangbare-manier-van.166679.lynkx

http://www.degroentenuitamsterdam.nl/

http://www.plantlab.nl/4.0/index.php/revolution-in-growing/?lang=nl

But also on straw balls:

http://www.earth-matters.nl/7/7291/duurzaam-20/meteen-en-overal-tuinieren-beplanten-met-strobalen.html