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.
Conservation Scientist. Conservation scientists focus on natural resources, and finding the balance between the use of resources and conserving them for future generations and the health of the planet. Foresters are conservation scientists who work exclusively with the health and use of forests.