👉 The term "leachiest" is typically used in the context of environmental science to describe a type of soil that is most contaminated by heavy metals, such as lead or mercury. This type of soil often contains high levels of these metals and can be harmful for plants and animals if they come into contact with it. In general, leaching refers to the process where toxic substances are transferred from one location to another through a physical or chemical means, which can include water, air, soil, or