In the second half of the program, author John Ross talks about his new book, The Promise of the Grand Canyon: John Wesley Powell’s Perilous Journey and His Vision for the American West .

This Green Earth - April 30, 2019 John Ross

This Green Earth is a weekly, hour-long program that focuses on the environment and environmentalism. Host Claire Wiley explore the science, politics, economics and ethics behind the environment, natural resources and sustainability.

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This Green Earth - April 30, 2019 John Ross

This Green Earth - April 30, 2019 John Ross

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