ar23100 ar23140 asia broeikaseffect changements climat climatechange climaticchanges conflictresolution earthsciences engineering environmental environmentalaspects environmentalstudies environmentandecology erwärmung erwärmung<meteorologie> europe geo781f globalairpollution globalwarming governmentpolicy greenhouseeffect klimaatveranderingen klimaschutz klimaänderung nonfiction peacestudies pollutioncontrol rb10438 research réchauffementdelaterre science socialaspects technology treibhauseffekt umw235f unitedstates