bacteriological pollution
11Lake — /layk/, n. Simon, 1866 1945, U.S. engineer and naval architect. * * * I Relatively large body of slow moving or standing water that occupies an inland basin. Lakes are most abundant in high northern latitudes and in mountain regions, particularly …
12Sewage — Black water redirects here. For other uses, see Blackwater (disambiguation). A medieval waste pipe in Stockholm Old Town formerly deposited sewage on the street to be flushed away by rain. Sewage is water carried waste, in solution or suspension …
13List of environmental topics (C) — This is a list of environmental topics. They relate to the effect of human activity on the environment.*cadmium poisoning *California Air Resources Board *California Certified Organic Farmers *California Coastal Conservancy *California… …
14technology, history of — Introduction the development over time of systematic techniques for making and doing things. The term technology, a combination of the Greek technē, “art, craft,” with logos, “word, speech,” meant in Greece a discourse on the arts, both… …
15Cyanobacteria — Temporal range: 3500–0 Ma Had n Archean …
16Japan — This article is about the country. For other uses, see Japan (disambiguation) …
17Drinking water — Tap water Drinking water or potable water is water pure enough to be consumed or used with low risk of immediate or long term harm. In most developed countries, the water supplied to households, commerce and industry is all of drinking water… …
18Chemical weapons in World War I — A poison gas attack using gas cylinders in World War I. The use of chemical weapons in World War I ranged from disabling chemicals, such as tear gas and the severe mustard gas, to lethal agents like phosgene and chlorine. This chemical warfare… …
19Biological warfare — For the use of biological agents by terrorists, see bioterrorism. Weapons of mass destruction …
20Foreign relations of the People's Republic of China — Diplomatic relations between world states and People s Republic of China   People s Republic of China …
