Commitment Practice what you preach I believe that the world needs sustainable development. I also believe that I have not yet done everything I could to promote it. Therefore I commit myself to actively changing my lifestyle to a more sustainable way. I believe that there are many opportunities to do so. I will find out about them and put them into practice as I can. I will also share my experiences to help others to do the same. I will contribute to this project, to find solutions for living together on this planet in a sustainable way.