experiences of a new immigration country (Germany). This reveals differences in the immigration policy as in the immigration … population in the respective countries. We resume the theoretical model implications which the existing immigration should have … countries. We conclude then with a summary on the controversial debate of the empirical studies if immigration is harmful to …

Integrierte Umweltschutztechniken gewinnen international an Bedeutung, weil von ihnen neben ökologischen Vorteilen …