Quadrilateral. In Euclidean plane geometry, a quadrilateral is a polygon with four sides (or 'edges') and four vertices or corners. Sometimes, the term quadrangle is used, by analogy with triangle, and sometimes tetragon for consistency with pentagon (5-sided), hexagon (6-sided) and so on.
Some environmental scientists and specialists focus on environmental regulations that are designed to protect peopleâs health, while others focus on regulations designed to minimize societyâs impact on the ecosystem.
Environmental science is a holistic and multidisciplinary field that integrates the biological, physical, and earth sciences. Its goal is to understand how earth works and how it supports life. It also aims to identify, control, and prevent disruption to its systems and species caused by human activity.