Resources of environmental information in Internet. The shortage in Spain of libraries and specialized centers of documentation in environmental subjects could partly be replaced by the consultation the services available in Internet. Within this context it is essential to consider network Internet, since, due to the growth that has experimented, it supposes excellent informative means. It offers new forms of access to the information that cannot be ignored, because they constitute at the present time the way fastest and economic to have a great volume of international information with diverse formats derived from the type on watch in which they are integrated.