Chemical engineering is a branch of engineering that combines pure sciences like physics, chemistry mathematics and economics to produce applications in energy, materials, construction medicine and healthcare sectors to improve the quality of life. Chemical engineers use the latest innovations in this field to design optimal production methods and techniques to minimize costs by maximize the safety and profitability. They make the best use of chemistry and engineering knowledge to turn raw materials into usable products such as, medicine, plastics, petroleum etc, on large scale for consumption that promote social and economic progress. Chemical engineers are involved in many aspects of plant design and operation, including safety and hazard assessments, process design and analysis, modeling, control engineering, chemical reaction engineering, nuclear engineering, biological engineering, construction specification, and operating instructions.