The correct answer is: A. Incineration
Incineration is the process of burning waste at high temperatures to reduce its volume and produce heat or electricity. It is the least preferred technique in the disposal of Municipal Solid Waste (MSW) because it produces air pollution, including dioxins and furans, which are known carcinogens. It also produces ash, which must be disposed of in a landfill.
Composting is the process of converting organic waste into a valuable soil amendment. It is a sustainable way to reduce the amount of waste sent to landfills and incinerators. Composting also helps to reduce greenhouse gas emissions.
Landfilling is the process of disposing of waste in a designated area. It is the most common method of MSW disposal in the United States. Landfills must be designed and operated to minimize environmental impacts.
Bricketting is the process of compressing waste into bricks. It is a relatively new technology that is being used to reduce the volume of waste and to produce a marketable product. Brickettes can
be used as fuel or as building materials.In conclusion, incineration is the least preferred technique in the disposal of MSW because it produces air pollution, ash, and greenhouse gas emissions. Composting, landfilling, and bricketting are all more sustainable options.