What was the environment like during the Klondike goldrush?

"The Klondike Gold Rush is credited for helping the United States out of a depression. Still, it had a horrific impact on the local environment, causing massive soil erosion, water contamination, deforestation and loss of native wildlife, among other things. The gold rush also severely impacted the Native people.Jan 17, 2018 "

i'm sorry i don't understand the question.