total suspended particulates
51Asbestos — For other uses, see Asbestos (disambiguation). Fibrous asbestos on muscovite …
52Global cooling — in general can refer to an overall cooling of the Earth. In this article it refers primarily to a conjecture during the 1970s of imminent cooling of the Earth s surface and atmosphere along with a posited commencement of glaciation. This… …
53Particle size distribution — The particle size distribution [Jillavenkatesa A, Dapkunas S J, Lin Sien Lum, Particle Size Characterization , NIST Special Publication 960 1, 2001] (PSD) of a powder, or granular material, or particles dispersed in fluid, is a list of values or… …
54Environmental policy of the United States — The environmental policy of the United States is federal governmental action to regulate activities that have an environmental impact in the United States. The goal of environmental policy is to protect the environment for future generations… …
55Aquarium — An aquarium (plural aquariums or aquaria ) is a vivarium consisting of at least one transparent side in which water dwelling plants or animals are kept. Fishkeepers use aquaria to keep fish, invertebrates, amphibians, marine mammals, and aquatic… …
