<iframe width="580" height="385" src="https://www.youtube.com/embed/7K-FPkhSF6Y?hl=en" frameborder="0" allowfullscreen></iframe> <br>Griffin's talk introduces Philadelphia's vertical farming and its exciting future. Vertical farming produces far more produce, with no pesticides, herbicides, ... <br><a href="https://www.youtube.com/watch?v=7K-FPkhSF6Y">source</a>