books.google.ca - This text presents a balanced treatment of environmental engineering by combining engineering concepts with the importance of environmental ethics. This third edition highlights sustainable development and emphasizes the need for engineers to become even...http://books.google.ca/books/about/Introduction_to_Environmental_Engineerin.html?id=vI0kNlm_imIC&q=sound+pressure+level&utm_source=gb-gplus-shareIntroduction to Environmental Engineering
