The Environmental Protection Agency has awarded the Navajo Nation nearly 90,000 dollars to study air quality in the town of Cove. KNAU’s Ryan Heinsius reports, many in the area worry that radioactive dust from nearby abandoned uranium mines is threatening …The Environmental Protection Agency has awarded the Navajo Nation nearly 90,000 dollars to study air quality in the town of Cove. KNAU’s Ryan Heinsius reports, many in the area worry that radioactive dust from nearby abandoned uranium mines is threatening …