Who is the most famous environmental engineer?

One of the most famous environmental engineers is Dr. David Allen, known for his work in air quality and pollution control. He played a significant role in developing methods for assessing and managing environmental impacts related to industrial processes. Additionally, figures like Dr. S. Fred Singer and Dr. John M. Todd have made notable contributions in the field, particularly in areas like climate change and sustainable practices. Their influence and research have helped shape modern environmental engineering.