For more than two years, Islamic State militants occupied the oil-rich town of Qayyarah in northern Iraq.
In August 2016, Iraqi forces liberated the town, forcing the terror group to retreat. Before they left, IS fighters torched several oil wells in the nearby oil field as well as a sulfur plant, leaving behind a legacy of prolonged health problems and environmental crises.
Oil has long been at the center of global conflicts, fuelling violence and instability
