There is an ever-growing concern for the impact we have on the earth and its resources. As such, it has become critical to study and understand the influence of our actions so as to minimize negative impacts and continue to fruitfully exploit the resources available. Motivated by this and his personal passion for fluid dynamics, most of Dr. Bolster's research to date has concerned the study of environmental fluid flows and contaminant transport across a wide range of scales and scenarios from groundwater flows in porous media, to confined buoyancy-driven flows in enclosed spaces such as buildings to larger scale buoyancy-driven atmospheric flows such as gravity currents.