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 multidisciplinary field that explores the dynamics between Earth systems, flora, fauna and humans. It involves research on air, water, soil, food and wildlife to understand system processes, identify environmental damage or hazards and develop solutions to environmental concerns.