Chemical engineers and chemists use knowledge of substances' properties and scientific study to accomplish their goals. However, chemists create and test different theories while chemical engineers apply current concepts to beneficial products. Chemical engineers apply chemicals and substances to a big production to deliver new products to the user, while chemists usually work on a small scale to conduct research and development. Even though chemical engineers work mostly at industrial plants, they occasionally work in laboratory environments. In general, chemical engineering is an interdisciplinary field that applies math, physics, and industry know-how to chemistry backgrounds.