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.
What Is Environmental Science? Environmental science seeks to understand and protect our environment. It encompasses many disciplines, like biology, chemistry, geology, physics and computer science. Read on for an overview of environmental science job options, responsibilities, degree programs and the career outlook. Schools offering Environmental Science degrees can also be found in these popular choices.