backwaters , small water courses, dunes with liana-covered Balkan oak-ash forests and sand steppes
Links:
[1] http://admin.indiaenvironmentportal.org.in/feature-article/blue-danube
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/down-earth
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/pollution-control
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/river-pollution
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/danube
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/rhine
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/riverine-ecology
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/waste-disposal
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/industrial-disasters
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/international-cooperation
[11] http://admin.indiaenvironmentportal.org.in/category/thesaurus/public-participation
[12] http://admin.indiaenvironmentportal.org.in/category/thesaurus/europe
[13] http://admin.indiaenvironmentportal.org.in/category/thesaurus/sustainable-development