The structures built into or on top of the ground in which trash is isolated from the surrounding environment are
Landfills
The structures built into or on top of the ground in which trash is isolated from the surrounding environment are landfills. Compost sites recycle only organic materials and to produce manure. Dustbins are used to accumulate wastes produced in households, offices and other public places. Biogas is the mixture of different gases produced by the breakdown of organic matter in the absence of oxygen. It is produced in biogas plants.