The topic of labor deal with bio/ethical problems associated with genetically modified organisms in the field of green genetic engineering. The goal is to show positive and negative sides of man's attempts to manipulate genes. The story goes in the direction of presenting problems, but also the benefits of human activities in the field of green genetic engineering for his life and impact on the whole created reality around him. God created man and ordered him to care for the earth and to subordinate everything to himself and the proff we can read in the initial verses of Genesis. In this subordination he has an important part in maintaining the balance of nature, the principle of responsibility and the maintenance of human existence. Man must take care of himself and the people around him, but also for the ambiance and environment in which he's located. He can exploit natural resources keeping in mind the virtue of prudence and moderation, in order not to disturb the harmony of the original plan of the Creator. This work is structured in three chapters that provides a view of not/ethics of human actions in the manipulation of genes, and respect for nature and it's development and disruption to disastrous consequences. The first section deals with the area of the fundamental realities of cloning, history of development of cloning and cloning problems of this type and methods of cloning. The second chapter presents and talks about green genetic engineering. The last, third chapter introduces the bio/ethical issues associated with cloning and in that sense ethical evaluation of the same, the principle of prudence and sustainable development and environmental problems in the documents of the Church's Magisterium.