California studying cannabis impacts in Mattole River watershed
The state Department of Fish and Wildlife is researching how cannabis cultivators who divert water from Mattole River streams might be impacting the river’s fish and insect populations… By fall 2019, the researchers will publish findings on the full environmental effects of cannabis grows. While the research is intended to “support efforts to establish” sustainable cultivation levels, the study’s main focus is analysis, said department representative Janice Mackey.