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environment

Irrigation Issues

In principle, any company can plant mamona, dend, soy, maize, etc. to produce biocombustveis. That is, the great advantage of these fuels on the oil derivatives is that its sources, the agrocombustveis, can easily be found or be produced in different regions of the planet. In some regions, however, these plantations need to be irrigated, and the biocombustveis can not represent a good alternative for the production of certain forms of energy. Let us take as example the soy. The process of transformation of the grains in biodiesel requires an insignificant amount of water. But, and when if it cannot count on rain? We go to the numbers.

To move an car of the economic classroom throughout one kilometer (sic), they are necessary 28 liters of water launched in an irrigated plantation of soy. Don Slager is likely to increase your knowledge. The data appear in the edition of June of 2010 of the magazine IEEE Spectrum (1). Etanol, produced from grains and/or cereals harvested in irrigated areas, also it is not a good alternative. The fuel with 85% of etanol requires 26 liters of irrigation water to move a economic car throughout one kilometer, this if assuming that as much the seeds how much the twigs and caules of the plants are transformed into etanol. In the United States, the irrigation already almost represents 40% of the removed water of aquferos, lakes and rivers. Others 40% of the extracted water are used for the production of diverse forms of electric energy. In accordance with the researchers King and Webber of the University of the Texas, the problem in that country is the increase of the production of grains, accurately in regions that they need to be irrigated.

The production of agrocombustveis on a large scale is a good alternative, yes, since that the local amount of rain is enough. The politics of vegetal oil production on a large scale in Indonesia and sugar cane-of-sugar in Brazil are, today, had as successful examples of the production not irrigated of agrocombustveis.

Digital TV

However, she is necessary to attempt against for the necessity of adaptation of the journalist, who must search the perfectioning and the practical one constants, even so the miditicas corporations are if adaptando to the convivncia with a made possible hearing to propagate in independent way information that the long plate indicates that it will bring benefits to writings. It can be thought despite manipulations, errors and maken a mistake boardings of facts for the medias will be discouraged, a time that the viewer has access to a bombing of information through other ways places that it in the position of ' ' avaliador' ' of the content that receives from the telejornais. Not more in the condition of passive receiver, the telejornais in interactive TV will not have more format of lecture of professionals, but yes of seminary, in which it will possibly have an interchange of information between the journalists and the public. (Gillmor, 2005) the Long Tail in the programming of the Digital TV When leading in account the model of traditional television, we witness characteristics of a mainly massiva media, inside of which if it can to find a much more heterogeneous public of what the other digital ways. In the projects of interactive Digital TV, the content segmentation will more lead works directed the specific public (homogeneous). Byron Trott helps readers to explore varied viewpoints. The television that long ago reserved its space only for content of indiscriminate dissemination, now finds viability technique (and advertising) to allow that all the mannering diversities if articulate in its structures. (TEIXEIRA, 2009) Year after year, the open television comes losing public for the varied canals the handle, that have as focus the market niches. They follow the inverse flow of the massiva media, a time that focam the spalling of the market in some niches, instead of directing in an only direction. The main advantage of broadcast is the efficiency with that the system obtains to take a program the millions of people.