Asked by eva

which is the following contributed most to fish population dying during the 1970?1. salt 2. toxic waste 3. predators 4. mercury 5. iodine
Answered by bobpursley
In Australia, 14 percent of fish kills were due to low levels of O2, 8 percent due to pesticide/toxic waste, and the other causes lessor.

http://www.fisheries.nsw.gov.au/__data/assets/pdf_file/0017/5057/nsw-fishkill.pdf

In the early 1970's, the James river had a major long term fish kill due to toxic waste, this caused a lot of public attention on clean water, and focusing on point source contimanations.
Answered by Yolanbus Campbell
Toxic waste
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