removing methane
41Ammonia — For other uses, see Ammonia (disambiguation). Ammonia …
42Greenhouse effect — The Greenhouse effect refers to the change in the thermal equilibrium temperature of a planet or moon by the presence of an atmosphere containing gas that absorbs infrared radiation. [ [http://www.ipcc.ch/pdf/assessment report/ar4/syr/ar4 syr… …
43Composting — Portalpar|Sustainable development|Sustainable development.svgComposting is the aerobic decomposition of biodegradable organic matter, producing compost. (Or in a simpler form: Composting is the decaying of food, mostly vegetables or manure.) The… …
44Safety lamp — A safety lamp is any of several types of lamp, which are designed to be safe to use in coal mines. These lamps are designed to operate in air that may contain coal dust, methane, or firedamp, all of which are potentially flammable or explosive… …
45digestive system, human — Introduction the system used in the human body for the process of digestion. The human digestive system consists primarily of the digestive tract (alimentary canal), or the series of structures and organs through which food and liquids pass… …
46New Zealand Emissions Trading Scheme — See also: Climate change in New Zealand The New Zealand Emissions Trading Scheme (NZ ETS) is a national all sectors all greenhouse gases all free allocation uncapped emissions trading scheme. The NZ ETS was first legislated in September 2008 by… …
47Sewage treatment — The objective of sewage treatment is to produce a disposable effluent without causing harm to the surrounding environment, and also prevent pollution.[1] Sewage treatment, or domestic wastewater treatment, is the process of removing contaminants… …
48Cyanide — This article is about the class of chemical compounds. For other uses, see Cyanide (disambiguation). The cyanide ion, CN−. From the top: 1. Valence bond structure 2. Space filling model 3. Electrostatic potential surface 4. Carbon lone pair… …
49Intensive farming — or intensive agriculture is an agricultural production system characterized by the high inputs of capital, fertilizers, labour, or labour saving technologies such as pesticides relative to land area. [http://www.britannica.com/eb/article 9042533… …
50Marine pollution — While marine pollution can be obvious, as with the marine debris shown above, it is often the pollutants that cannot be seen that cause most harm. Marine pollution occurs when harmful, or potentially harmful effects, can result from the entry… …
