We study structures on the fields of characteristic zero obtained by introducing operations of raising to power. Using Hrushovski–Fraisse construction we single out among the structures exponentially-algebraically closed once and prove, under certain Diophantine conjecture, that the first order theory of such structures is model complete and every its completion is superstable.

The International Institute for the Study of Man has promoted a research theme charged with a project of reforestation of the Atlas Mountains to be proposed to the E.C.The Atlas Project relies on three fundamental assumptions: a. there is the need to build CO2 sinks that, at the same time, are a source of energy and income in regions from which, due to the lack of both, vast migratory flows start. The state members of the European Community are not able (...) to absorb the quantity of CO2 produced by industrial combustion, the heating system and cars, and they still do not follow the international agreement on pollution control;b. a regular stream of air from Northern Europe discharges its humidity on the Atlas Mountains, before it re-ascends over Europe. This stream of air could be a natural carrier for conveying and immobilising the CO2 produced in the industrial regions of Europe through its fixation in timber on the Atlas Mountains before it re-ascends over the European continent;c. the Moroccan area, and North Africa in general, are the source of a large number of immigrants into Europe due to the high population pressure and the lack of employment. (shrink)

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