The remote Duck Valley reservation that straddles Nevada and Idaho has battled toxic contaminants on its land for decades. Shoshone and Paiute residents suspect fuels and chemical spills and leaks from U.S. government buildings have caused widespread illness and death. No one can say for sure. And, now, there's a new twist. The discovery of a decades-old document with a passing mention of Agent Orange chemicals suggests the government may have been more involved in contaminating the land. The U.S. Bureau of Indian Affairs says it's investigating whether the chemicals were sprayed around irrigation canals and is would work with the tribes on an action plan

San Mateo residents may notice more weeds in parks and medians after officials opted to stop using the herbicide glyphosate, also known by the…