water is a fish's natural element
11Natural resource management — The Tongass National Forest in Alaska is managed by the United States Forest Service. Natural resource management refers to the management of natural resources such as land, water, soil, plants and animals, with a particular focus on how… …
12Natural History (Pliny) — Naturalis Historia, 1669 edition, title page. The title at the top reads: Volume I of the Natural History of Gaius Plinius Secundus. The Natural History (Latin: Naturalis Historia) is an encyclopedia published circa AD 77–79 by Pliny the… …
13Water Resources Development Act of 2000 — The Water Resources Development Act of 2000 (WRDA 2000), USPL|106|541, was enacted by Congress of the United States on December 11, 2000. [ [http://thomas.loc.gov/cgi bin/toGPObss/http://frwebgate.access.gpo.gov/cgi bin/getdoc.cgi?dbname=106 cong …
14Natural product — Paclitaxel (Taxol) is a natural product derived from the Yew tree.[1] A natural product is a chemical compound or substance produced by a living organism found in nature that usually has a pharmacological or biological activity for use in… …
15element — /el euh meuhnt/, n. 1. a component or constituent of a whole or one of the parts into which a whole may be resolved by analysis: Bricks and mortar are elements of every masonry wall. 2. Chem. one of a class of substances that cannot be separated… …
16Water crisis — For other uses, see Water crisis (disambiguation). Deforestation of the Madagascar Highland Plateau has led to extensive siltation and unstable flows of western rivers. Water crisis is a general term used to describe a situation where the… …
17Mercury (element) — gold ← mercury → thallium Cd ↑ Hg ↓ Cn …
18Outline of water — Faucet dripping water. Structure of the …
19Classical element — For other uses of 4 elements, see Four elements (disambiguation). For other uses of 5 elements, see Five elements (disambiguation). Many philosophies and worldviews have a set of classical elements believed to reflect the simplest essential parts …
20inland water ecosystem — ▪ biology Introduction complex of living organisms in free water on continental landmasses. Inland waters represent parts of the biosphere within which marked biological diversity, complex biogeochemical pathways, and an array of… …
