In the past years, I heard alot about ecology or about the term of being friendly whit the suroundings, this becoming more used in shows, advertizers or by products. Today, the term of being friend whit the surounding is so used, that it's lost a bit a bit the sence.Understanding the true sence of the word, you, can make your life and the life of the others arround you healthyer, to live in a healthy city.