Philadelphia Ghost Signage Project

Here is an interesting site about Philadelphia ghost signage...
I stumbled upon it while doing some research about PHL history, and the photographs and information are pretty interesting. Enjoy.

http://www.lawrenceotoole.com/signs/signs.html

3D Urban Farms

I found this article about an interesting approach to urban farming. These design proposals show fruit, vegetables and even animals grown in skyscrapers. I'm not exactly sure how they function but the renderings are nice.

Urban Farming in 2050?