Our environmental sensitivity and consciousness led us to alternative methods for the Energy savings. In 2012 NEF-NEF proceeded with the installation of photovoltaic systems on the roof of our housing facilities whose power comes to 80KWp. The avoiding pollutants (CO2) comes to 80 tones. Considering the fact that two forest hectares absorb 1.3 tones CO2, the specific construction equates with 123 forest hectares.