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Final answer:False, current landfills are inadequate for managing the Nation's waste long-term due to factors like landfill overflow, plastic waste, toxin release from incineration, and the need for cost-effective, environmentally safe disposal methods.Explanation:False, existing landfills are not generally considered sufficient to serve as the sole means of disposing of the Nation's waste for the foreseeable future. Decisions in siting hazardous waste facilities consider economics, geological suitability, and political climate. High land costs and inadequate waste management can prevent the development of new waste sites. Landfill overflow, groundwater contamination, and the increasing generation of plastic waste are critical factors in evaluating the efficiency of current disposal methods. Plastic, a major component of modern waste, is often single-use, non-decomposable in landfills, and releases carcinogens when incinerated.Societies are challenged with the task of managing waste in a cost-effective and environmentally protective manner. However, due to the rising volume and toxicity of waste, alongside the limited capacity and environmental risks of existing landfills and incineration, alternative solutions like recycling and improvements in waste reduction are becoming more crucial. As such, existing landfills alone are insufficient to manage all waste sustainably....