Traditional soil improvement has negative impact in a world that is seeing an extreme demographic growth, with consequent larger land use and need for infrastructure. In recent years, the growing need to find alternative has led to the development of new technologies in the fields of civil and environmental engineering. Among these, Microbially Induced Calcite Precipitation (MICP), represents a technology capable of improving the mechanical characteristics of soils, with a lower environmental impact. The technology is still in an experimental state and extensive research has been conducted to fully understand the processes behind it, from the laboratory to the field scale.