This paper presents foundations for building mobile environmental information systems (MEIS) that require a multidisciplinary approach. MEIS require expertise from environmental biology, geography and mobile technology. MEIS are very promising in bringing added value in the acquisition of environmental information with a multitude of mobile devices. Automatic mobile acquisition makes it easy to forward the information to central databases for storage, further processing and again for distribution to the mobile devices in a form that is useful to the users of the mobile devices. These systems can be used both in protecting the nature as well as in recreational use that will take the constraints of the nature into account. In this paper we describe preliminary results of MINNE project and three prototypes currently under research in MINNE project.