It is urgent that we assume the duty of fighting for the fundamental ethical principles, like respect for the life of human beings, the life of other animals, the life of birds, the life of rivers and forests.  I do not believe in love between men and women, between human beings, if we are not able to love the world.  Ecology takes on fundamental importance at the end of the century.  It has to be present in any radical, critical or liberationist educational practice.  For this reason, it seems to me a lamentable contradiction to engage in progressive, revolutionary discourse and have a practice which negates life.  A practice which pollutes the sea, the water, the fields, devastates the forest, destroys the trees, threatens the birds and animals, does violence to the mountains, the cities, to our cultural and historical memories. – Paulo Freire