Matt, Sarah, and Doug discuss all things geochemistry with UK Earth and Environmental Sciences professor Andrea Erhardt. The trio tackles the importance of geochemistry to our understanding earth processes, the atmosphere, and other planets. Dr. Erhardt takes them through a wide-range of topics including geochemical spheres, high and low-temp geochemistry, chemical weathering, paleo climates, mineral precipitation, the dolomite problem, geochemical environments, pH, acid mine drainage, water contamination, eutrophication, and much more!