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Switzerland is willing to have his presence in the International Exhibition of Zaragoza (June to September) did not go unnoticed. And that does not happen the Swiss Federal Institute for Water Research, EAWAG, will also present their research. One of them has to do with control of water quality.

Eduard Hoehn, a geologist at the research organization, located in a sustainable building, said: "Switzerland is like a castle in which the water runs off and goes to other countries" and that 40% of the water consumed in the country comes from wells are not drinkable. "As the risk of contamination by agricultural fertilizers is large, we have implemented a strict control of each well and buffer zones around them," he says.

Chemical Abstracts Service (CAS), a division of the American Chemical Society, has launched a new free resource called Web-based Common Chemistry (TM). This resource is helpful to other people and no chemicals that could release a chemical name or CAS Registry Number (R) of a chemical common to compare both daily and pieces of
information.

Common Chemistry contains some 7,800 chemicals for use on a large scale and great interest, in addition to 118 elements of the periodic table. With the exception of some elements, the remaining substances in this collection have been estimated as of the scale have been cited over 1,000 times in the CAS databases. Common examples of substances in Chemistry include more recognizable, such as caffeine, benzoyl peroxide (acne treatment) and sodium chloride.

Atmospheric particles, or particulate matter, can be solid or liquid with diameters varying from around 0.002[micrometers] to roughly 100[micrometers]. Atmospheric aerosol sources can be classified as primary or secondary, with the primary aerosol being directly emitted from the corresponding sources and the secondary particles being formed in the atmosphere, for example, from gas-phase chemical reactions that produce condensable vapors. At the same time aerosol particles are ultimately connected with the formation of water droplets and equivalently with the formation of clouds and fogs in the atmosphere.