Homonym: Thresholds (Limit)
A threshold is a point or level at which something begins or changes. It can refer to various contexts, such as a physical boundary, a limit in scientific measurements, or a psychological barrier. For example, in psychology, a pain threshold indicates the minimum intensity of a stimulus that causes a sensation of pain.
In environmental science, a threshold level can refer to the concentration of a pollutant that, when exceeded, leads to harmful effects on ecosystems. Understanding thresholds is crucial for making decisions in fields like healthcare, environmental policy, and engineering, where knowing limits can help prevent negative outcomes.