maintain contamination
81Judaism — /jooh dee iz euhm, day , deuh /, n. 1. the monotheistic religion of the Jews, having its ethical, ceremonial, and legal foundation in the precepts of the Old Testament and in the teachings and commentaries of the rabbis as found chiefly in the… …
82Agriculture — General …
83Alternative medicine — Alternative medical systems …
84Asbestos — For other uses, see Asbestos (disambiguation). Fibrous asbestos on muscovite …
85Soil — For other uses, see Soil (disambiguation). A represents soil; B represents laterite, a regolith; C represents saprolite, a less weathered regolith; the bottommost layer represents bedrock …
86Anthrax — For other uses, see Anthrax (disambiguation). Anthrax Classification and external resources Microphotograph of a Gram stain of the bacterium Bacillus anthracis, the cause of the anthrax disease …
87Welding — is a fabrication process that joins materials, usually metals or thermoplastics, by causing coalescence. This is often done by melting the workpieces and adding a filler material to form a pool of molten material (the weld puddle ) that cools to… …
88Organic farming — Agriculture General …
89Hygiene — refers to practices associated with ensuring good health and cleanliness. Such practices vary widely and what is considered acceptable in one culture may be unacceptable in another. In medical contexts, the term hygiene refers to the maintenance… …
90Parallel universe (fiction) — A parallel universe or alternative reality is a hypothetical self contained separate reality coexisting with one s own. A specific group of parallel universes is called a multiverse , although this term can also be used to describe the possible… …
