underwater storing
51Arctic Regions — ▪ 2009 The Arctic regions may be defined in physical terms (astronomical [north of the Arctic Circle, latitude 66° 30′ N], climatic [above the 10 °C (50 °F) July isotherm], or vegetational [above the northern limit of the tree line]) or in human… …
52Compressed air energy storage — Conceptual representation of the compressed air energy storage concept. Off peak (low cost) electrical power compresses air into an underground air storage “vessel” (the Norton mine), and later the air feeds a gas fired turbine generator complex… …
53Recall (memory) — Recollection redirects here. For other uses, see Recollection (disambiguation). Recall in memory refers to the retrieval of events or information from the past. Along with encoding and storage, it is one of the three core processes of memory.… …
54Outline of forestry — See also: Index of forestry articles The following outline is provided as an overview of and guide to forestry: Forestry – the art and science of managing forests, tree plantations, and related natural resources. Forest ecosystems have come to be …
55Concrete — This article is about the construction material. For other uses, see Concrete (disambiguation). Outer view of the Roman Pantheon, still the largest unreinforced solid concrete dome.[1] …
56Charge-coupled device — A specially developed CCD used for ultraviolet imaging in a wire bonded package. A charge coupled device (CCD) is a device for the movement of electrical charge, usually from within the device to an area where the charge can be manipulated, for… …
57Forest — This article is about a community of trees. For other uses, see Forest (disambiguation). A conifer forest in the Swiss Alps (National Park) …
58Kaiserliche Marine — The Kaiserliche Marine or Imperial Navy was the German Navy created by the formation of the German Empire. It existed between 1871 and 1919, growing out of the Prussian Navy and Norddeutsche Bundesmarine. Kaiser Wilhelm II greatly expanded the… …
59Plant — For other uses, see Plant (disambiguation). Plants Temporal range: Early Cambrian to recent, but see text, 520–0 Ma …
60Renewable energy — Burbo Bank Offshore Wind Farm, at the entrance to the River Mersey in North West England …
