Acid rain, economic development, and a century of mining pollute Rocky Mountain waters.
United States of America
Documentary
56 minutes
1990
Christopher 'Toby' McLeod
Bullfrog Films,
Earth Image Films
2013
5.0
2017
0.0
1951
0.0
1939
0.0
1951
0.0
1951
0.0
1952
0.0
1952
0.0
2016
9.5
2021
8.0
2023
0.0
1951
0.0
2008
8.0
2019
7.0
1970
0.0
2016
6.8
2016
6.2
2006
7.3
2013
7.6
2022
0.0