Saturday, December 8, 2007

Nutritional Value Duck Chow Mein


L’energia è il principio vitale di ogni essere: l’uomo, a differenza dei vegetali e degli altri animali, non solo è in grado di attingere dall’ambiente in maniera passiva l’energia di cui ha bisogno per il proprio metabolismo, ma ha sempre necessitato di produrre energia anche attraverso processi tecnologici di trasformazione sia di elementi quali acqua, vento, ecc., sia di altre risorse disponibili in natura (legno, carbone, gas, petrolio, ecc.).
A partire soprattutto dagli inizi del ‘900 i processi economici e sociali di crescita di una parte del mondo hanno fatto sì che il fabbisogno di energia abbia subito un incremento vertiginoso: si calcola that in the last century, this demand has increased tenfold and continues to grow at a rate of 2-2.5% per year. And what if there is a situation of great inequality that sees large shares of the world's population still in a state of extreme marginalization from the access and use the energy produced, and legitimately claim the right to greater participation in the development and growth.
The energy needs are currently met for three quarters of fossil fuels (oil, gas, coal) account for 7% from nuclear, the rest from renewable sources in different forms (biomass, hydro, geothermal, wind, solar). Leaving aside the devastating effects
which air, water and earth and increasing overall global temperature increased the release of an unsustainable amount of carbon dioxide in the atmosphere as a result of reckless use of fossil resources as well, now we are in a situation in which over 90 years of little more than conventional sources of energy will be practically empty: beyond the issue of rising costs that the extraction of these resources will lead in years, experts predict that in fact the current rate of growth in energy consumption we have more oil between 40.45 years, gas and uranium between 65-70 years from 70 years. Only for coal forecasts are more optimistic It is estimated that we will have declining stocks and increasingly prohibitive costs for another 200 years.
Regarding uranium, recently re-evaluated by many especially in view of the environmental damage caused by other resources, whether it was used to cover the entire world's energy needs, its reserves would last less than 5 years!
What can be done before the environmental impact and climate pollution from traditional energy reaches a point of no return and that the limited natural resources, exacerbate social tensions, economic and political, which is already dangerously present and operating in the international arena, to control energy sources?
In a medium-term vision that still need to see a rethinking of the concept of "growth" only ever measured in quantitative terms, and cultural patterns related to how to "consume", the only way forward now seems to turn in a context of a more equitable distribution of resources, based on two basic choices:

- energy saving
- the use of renewable energy.

Saving energy involves radically change lifestyles, perhaps mainly based on the false belief that the current energy model is infinitely expandable, in order to reduce waste and increase efficient energy production. Very important I think the campaign recently launched by Eni (called Eni 30%) through which you intend to sensitize the public to take a few simple measures can save up to 30% of energy currently consumed.
an efficient energy produced and used instead requires broader decisions that involve major economic investment, legal, political choices seriously focused on research and scientific innovation.
In this sector, Italy once again pay a big delay: Just think, for example, the heating of homes, whose energy needs in Germany (by law, but above all as houses are built) will not normally exceed 70 kWh per square meter per year (the so-called "passive houses" in fact no more than 15 kWh/m2anno) while in Italy, with a much milder climate, you can reach easily the kWh/m2anno 150-200.
The production of energy from renewable sources and in particular through the PV system is painfully in recent years by significant but still insufficient, progress.
The experiences in countries such as Spain and, once again, Germany, indicate that an efficient model based on the use of renewable resources through the creation of a production system diffuse and localized energy that is based on the principles of micro-and-handling.
for today I will only bring the problem in a future post I will explain my views on possible solutions to the energy problem of the opportunities within existing legislation.


Post a Comment