As we honor National Chemistry Week, we wanted to highlight the largest living bio-filter system in North America. In the new Papadakis Integrated Sciences Building on the West Philadelphia campus of Drexel University, you will find a bio-filtration laboratory that features a visually captivating wall of plants. The meandering wall of plants that extends upward by five stories … [Read more...] about The Largest Living Bio-Filter in North America Using Hydroponics