 So here we are on the roof of the Forest Resources building. This is an example of a green roof, which is a type of green infrastructure. Green infrastructure is a combination of an ecological and engineering solution to many urban problems. So many urban problems today are due to increasing changes in urban populations, as well as increasing challenges due to changes in climate and pressures on infrastructure. So one of the things that green infrastructure systems do is they mitigate many of these problems. Green roofs are an example of this because they reduce the heat load on buildings. They end up being a place that is pleasant to be around at the same time, so there's an added value. And they also can reduce stormwater runoff off of the rooftops and into the sewer systems of state college. So they provide multiple benefits. Green infrastructure systems represent sustainability. They are environmentally sound, socially just, and economically feasible. So they represent those three angles of sustainability that we've been learning about. So one of the challenges in urban ecology is thinking about how to embed green infrastructure systems into a lived urban environment. Where we are right now is on Barnard Street. It's about a block from the west end of campus. We're right between Aviva Ave and college. And what we're looking at here is a bioswale system, which is meant to mitigate flooding. What happens is, if you look up on this end, this is where the rainwater will come in to the system. It then will carry on through a series of ducts all the way down here. If you look at the far end, there's a place where the water will come out and then it will empty into a storm drain. This particular type of green infrastructure system is meant to slow the infiltration rate of water, allow the water to percolate into the soil and slow down flooding. And right down the stream of us, essentially, is the fire station. And so this particular site was identified as a location that could be used to mitigate flooding of the fire station. So it's used as a design element as well. You can see there's lots of vegetation here that is xeric, which means it doesn't need a lot of water. It likes to grow in relatively dry conditions. So this site doesn't need a lot of maintenance, but it provides beauty to the community. While also providing an ecosystem service to the community by mitigating flooding. So it's a pretty typical bioswale green infrastructure system right here in downtown state college.