The November 2016 Market Report of the Australian Clean Energy Finance Corporation identifies facilities that turn urban waste into electricity as a major investment opportunity. About 23 million tons of urban waste per year is sent to landfills in Australia. Energy from waste projects can divert some of this landfill and produce reliable renewable energy. These projects are eligible for government support, and their costs of production are subsidized by state landfill levies. Is the urban waste a positive or a negative externality? Why is a market solution practical here?