. . . . . . . . . . "Downloadable audio books"@en . "Audiobooks"@en . . . . . . . "Global warming global threat"@en . "Global warming global threat" . . . . "This course will discuss the complex interdependent systems that regulate the environment of Earth. Also, this course offers listeners a comprehensive overview of the essential environmental issues of our time. Some of the issues discussed include: air pollution, acid rain, depletion of the stratospheric ozone, destruction of tropical forests, and impending climate changes." . "Harvard University professor, Michael B. McElroy delivers a course that will discuss the complex interdependent systems that regulate the environment of Earth. Also, this course offers listeners a comprehensive overview of the essential environmental issues of our time including: air pollution, acid rain, depletion of the stratospheric ozone, destruction of tropical forests, and impending climate changes."@en . "Professor McElroy aims to provide listeners with a better understanding of the overwhelming impact of industrial pollutants on the earth. He discusses the complex interdependent systems regulating the environment of Earth, and offers an overview of environmental issues, such as air pollution, acid rain, depletion of the stratospheric ozone, destruction of tropical forests, and impending climate changes." . . .