Controlled tipping is method of disposal of –
**Core Concept**
Controlled tipping, also known as sanitary landfilling, is a method of waste disposal that involves the careful placement and compaction of waste in a controlled environment, typically a landfill. This technique aims to minimize environmental impacts by using a series of layers, including a bottom liner, drainage layer, and cover soil, to prevent leachate migration and gas emissions.
**Why the Correct Answer is Right**
Controlled tipping is a method of waste disposal that involves the careful placement and compaction of waste in a controlled environment. The process begins with the excavation of a site, followed by the placement of a bottom liner to prevent leachate migration. A drainage layer is then added to facilitate the collection of leachate, which is the liquid that seeps from the waste. The waste is then compacted in layers, typically using heavy machinery, and covered with a layer of soil to prevent pest infestations and odor emissions. The use of controlled tipping helps to minimize environmental impacts by reducing the likelihood of groundwater contamination and methane gas emissions.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not accurately describe controlled tipping, which is a method of waste disposal that involves the careful placement and compaction of waste in a controlled environment.
**Option B:** This option is incorrect because it is not a recognized method of waste disposal.
**Option C:** This option is incorrect because it is not a method of waste disposal that involves the careful placement and compaction of waste in a controlled environment.
**Clinical Pearl / High-Yield Fact**
It's essential to note that controlled tipping is a regulated process, and landfills must comply with strict guidelines to minimize environmental impacts. The process involves regular monitoring of leachate and gas emissions, as well as regular maintenance to prevent pest infestations and odor emissions.
**Correct Answer: D. Controlled tipping.