Certified Environmental Scientist
Free Certified Environmental Scientist (CES) practice test with instant feedback and detailed answer explanations. Prepare for your certification exam.
About the Author
Dr. Laura ChenPhD Environmental Science, MS Chemistry, CHMM
Environmental Scientist & Sustainability Certification Expert
UC Berkeley College of Environmental DesignDr. Laura Chen holds a PhD in Environmental Science and an MS in Chemistry from UC Berkeley. A Certified Hazardous Materials Manager with 15 years of environmental consulting experience, she specializes in ISO 14001 environmental management, HAZWOPER certification, and wastewater operator licensing. She has coached professionals through state and federal environmental certification programs nationwide.