Balancing benefits and risks in food waste biochar: Pyrolysis severity effects on contaminant fate, nutrient leaching, and biological safety - Ojima Z. Wada; Rashad Al-Gaashani; Sruthi Udayakumar; Sara Wahib; Tricia A. Gomez; Tareq Al-Ansari; Khaled A. Mahmoud (Waste Management, 2026)