Congressmen Scott Peters (D-CA) and Doug LaMalfa (R-CA) introduced bipartisan legislation on Monday that would combat the use of banned pesticides on illegal cannabis cultivation sites on public lands. … Researchers published findings last year linking banned pesticides and other destructive practices on illegal farms with harms to specific wildlife species in habitats in California and southern Oregon: the Pacific fisher, Humboldt marten, and northern spotted owl. Those toxins sometimes eventually find their way into the U.S. groundwater supply.