Providing Efficient, Effective, and Innovative Waste Management Solutions. Southern Logistics & Environmental (SLE) is a full service waste management company based in Greensboro, NC. SLE specializes in the management of Hazardous Waste, Non Hazardous Waste, Universal Waste, Raw Materials, and Recyclables. Our design of unique waste management programs are custom fit to your company's individual needs which can include any combination of site services, waste profiling & analysis, and various transportation, disposal, and recycling options. Whatever your environmental goals, you can count on SLE's fully trained specialists to assist you in achieving them.