Waste Management is becoming one of the key problems of the modern world - an international issue that is intensified by the volume and complexity of society's domestic and industrial waste. Unfortunately, many of the practices adopted in the past were aimed at short-term solutions without sufficient regard or knowledge for long-term implications on health, the environment or sustainability and this, in many cases, is leading to the need to take difficult and expensive remedial action.With our growing awareness of the detrimental environmental effects of current waste disposal, there is a significant onus on accountability for effective waste management. Better practice and safer solutions are required. There is a need for more research not only on current disposal methods such as landfill, incineration, chemical and effluent treatment, but also on recycling, waste minimization, clean technologies, waste monitoring, public and corporate awareness, and general education.Featuring papers published at the Fourth International Conference on Waste Management and the Environment, this book contains contributions on the following topics: reduce, reuse and recycle (3r's); advanced waste treatment technology; clean technologies; waste reduction and recycling; wastewater treatment, resources recovery; waste incineration and gasification; waste pre-treatment, separation and transformation; methodologies and practices; landfills, design, construction and monitoring; soil and groundwater clean-up; community awareness; biological treatment of waste; air pollution control; hazardous waste; waste management; construction and demolition waste; costs and benefits of waste management options; energy from waste; and risk assessment.