The article presents criteria for evaluation of information sources in Information Science. It describes transformations in the knowledge after the Internet, which interferes directly in the information sources, allowing the access to the scientific information from anywhere in the world. It points out the information boom because of the online communication networks and it shows the importance of communication and information technologies as facilitators in the access to diffuse information on the environment for the society. The evaluation of the National Information System for the Environment according to criteria for evaluation of information sources is presented, with emphasis on accessibility. It concludes that the site fulfills the user needs, since it obeys the proposed criteria.
Information sources; information sources evaluation; accessibility; National Information System for Environment
