There are hundreds of tons of squander decaying in a warehouse, with tin roof, at the corner of the Union Carbide factory in Bhopal. This pesticide factory has been storing this waste for more than two decades after the poison gas leak incident of Bhopal that had killed thousands and had turned the city into a tarnished disaster industrial zone.
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Waste, rubbish, trash, or garbage is unwanted or undesired material.
There are a number of different types of waste. It can exist as a solid, liquid, or gas or as waste heat. When released in the latter two states the wastes can be referred to as emissions. It is usually strongly linked with pollution. Waste may also be intangible in the case of wasted time or wasted opportunities. The term waste implies things which have been used inefficiently or inappropriately.
Some components of waste can be recycled once recovered from the waste stream, e.g. plastic bottles, metals, glass or paper. The biodegradable component of wastes (e.g. paper & food waste) can be composted or anaerobicly digested to produce soil improvers and renewable fuels. If it is not dealt with sustainably in this manner biodegradable waste can contribute to greenhouse gas emissions and by implication climate change [1].