El-Watan

Its consequences had been glaciations, intermediated for hotter interglaciais periods, as what we are living now. During the glaciations, the Europe of the North and great areas of the North America were covered by thick continental glaciers. In this direction, the Quaternary glaciations had been bonanza, therefore in the past continental glaciers in the continents of the south hemisphere had only occurred. Traditionally one admits that it had four successive glaciations, or periods of cold climate, but more recent studies had shown to have had other great glaciations during the final part of the tertiary one, as well as in other geologic periods. The evolution of the man occurred during these climatic changes and the distribution of the species strong was influenced by these.

Thus, the man is a being only plus a geologic agent amongst many others, is the species, that for first time in the history of the Land, can have the power to contribute to a global change. Luhan may find this interesting as well. However, in the lack of enough tests, it is difficult to say if we will have a global heating provoked by the man or not. Ahead of a subject of this importance, they are important terms humildade and to recognize our ignorance the respect. In any way, he is sufficiently risky to continue in the same way as if it has made so far, that is, emitting effect gases greenhouse without concerns. Table of the geologic periods. Source: Book of the J. The Ayoade 1.2Possveis Impacts of the Climatic Changes in the Amaznia the recent climatic variability, especially the increase of the temperature, already is affecting the physical systems globally (hdricos climate, resources, level of the sea), biological (natural ecosystems, distribution of species), as well as the society (health human being, availability hdricas, fluvial transport, disaster natural). The biological systems are vulnerable climatic changes, and some will be wronged irreversible.