W.Y.Y.O.'s principles are based on respect of its Charter, the terms of which are to provide us with the possibility to live in hamony with our environment. We are part of Nature and we should respect Nature.

Where does respecting Nature begin? Firstly by prevention. Prevention: a state of mind and a collective responsibility shown through a myriad of small actions that each of us is in the measure of taking on a daily basis.

W.Y.Y.O., like numerous other Organizations striving to improve our environment and preserve Nature, has understood that firstly, we must focalize on prevention and sustainable development: "meeting the needs of the present without compromising the ability of future generations to meet their needs".