Fundamentals of environmental and toxicological chemistry‎:‎ sustainable science‎,‎ fourth edition covers university‎-level environmental chemistry‎,‎ with toxicological chemistry integrated throughout the book‎.‎ This new edition of a bestseller provides an updated text with an increased emphasis on sustainability and green chemistry‎.‎ It is organized based on the five spheres of earth‎'‎s environment‎:‎ ‎(‎1‎)‎ the hydrosphere ‎(‎water‎)‎‎,‎ ‎(‎2‎)‎ the atmosphere ‎(‎air‎)‎‎,‎ ‎(‎3‎)‎ the geosphere ‎(‎solid earth‎)‎‎,‎ ‎(‎4‎)‎ the biosphere ‎(‎life‎)‎‎,‎ and ‎(‎5‎)‎ the anthrosphere ‎(‎the part of the environment made and used by humans‎)‎‎.‎ The first chapter defines environmental chemistry and each of the five environmental spheres‎.‎ The second chapter presents the basics of toxicological chemistry and its relationship to environmental chemistry‎.‎ Subsequent chapters are grouped by sphere‎,‎ beginning with the hydrosphere and its environmental chemistry‎,‎ water pollution‎,‎ sustainability‎,‎ and water as nature‎'‎s most renewable resource‎.‎ Chapters then describe the atmosphere‎,‎ its structure and importance for protecting life on earth‎,‎ air pollutants‎,‎ and the sustainability of atmospheric quality‎.‎ The author explains the nature of the geosphere and discusses soil for growing food as well as geosphere sustainability‎.‎ He also describes the biosphere and its sustainability‎.‎ The final sphere described is the anthrosphere‎.‎ The text explains human influence on the environment‎,‎ including climate‎,‎ pollution in and by the anthrosphere‎,‎ and means of sustaining this sphere‎.‎ It also discusses renewable‎,‎ nonpolluting energy and introduces workplace monitoring‎.‎ For readers needing additional basic chemistry background‎,‎ the book includes two chapters on general chemistry and organic chemistry‎.‎ This updated edition includes three new chapters‎,‎ new examples and figures‎,‎ and many new homework problems‎.‎