 Soil carbon is a part of the organic matter in soil. Organic matter is made up of decomposing plant residues and animal residues, basically anything that was at one point living. Carbon is a fraction of that. It's what gives soil that dark, rich color. So one fun fact that people may not know about soil carbon is that it's actually food for soil microorganisms. So in one handful of healthy soil, there are billions of microorganisms, more than there are people on earth. And those microorganisms rely on carbon as a food source. And those microorganisms also perform a lot of functions in soil, like taking nutrients that are not in plant available form and then converting those into plant available form. So they do help plants actually grow in the soil. I grew up around agriculture and I was an undergraduate at Auburn University. I actually majored in chemistry, but I started working for a soil scientist as an undergraduate and we were working on projects to look at what practices do improve soils. And so that took the chemistry parts that I was excited about and really made it a plot and an applied topic and I really loved that. And so I've gone with it ever since.