In Education for Sustainability: a contribution to the Decade of Education for Sustainable Development, the author, Moacir Gadotti, affirm that sustainability has a great educational potential which has not yet been sufficiently explored. Sustainability is the dream of leading a good life with a dynamic balance among other people and nature. Education for sustainability means to educate for a sustainable life. Sustainability is closely related to planetarity, which means, to see the Earth as a living superorganism in constant evolution and as a community. This paradigm allows us to better understand the problems of desertification, of deforestation and global warming that affect humans and non-humans nowadays.