1. Graphene-based Nanomaterials Toxicity in Fish -- 2. Environmental Problems of Mining Waste Disposal Sites in Russia -- 3. Mercury (Hg), lead (Pb), cadmium (Cd), selenium (Se) and arsenic (As) in liver, kidney and feathers of gulls: A review -- 4. Pesticides and Related Toxicants in the Atmosphere.Reviews of Environmental Contamination and Toxicology attempts to provide concise, critical reviews of timely advances, philosophy and significant areas of accomplished or needed endeavor in the total field of xenobiotics, in any segment of the environment, as well as toxicological implications.