Katherine Levy remembers a childhood deeply rooted in the natural offerings of Lake Tahoe – water-skiing in the summer and working as ski instructor on the surrounding snow-covered mountains during winter months.

She recently moved back to live out her retirement along the lake’s north shore. But she doesn’t like what she has found upon her return: a US government plan to spray multiple types of herbicides, including the cancer-linked glyphosate weed killer – within national forest property that abuts the community’s cherished lake.