Desert sand, sea salt, volcanic ash and other forms of natural pollution are adding to rising levels of man-made dirt sullying the air and making it harder, especially for Mediterranean countries,
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/sand-salt-volcanoes-add-eu-clean-air-challenge
[2] http://admin.indiaenvironmentportal.org.in/category/author/stephanie-ebbs
[3] http://admin.indiaenvironmentportal.org.in/category/newspaper/planet-ark-australia
[4] http://admin.indiaenvironmentportal.org.in/thesaurus/sand-mining
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/salt
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/volcanic-eruptions
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/european-union-eu
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-pollution
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/spain
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/forest-fires
[11] http://admin.indiaenvironmentportal.org.in/category/thesaurus/desert-spread
[12] http://admin.indiaenvironmentportal.org.in/category/thesaurus/climate-change
[13] http://admin.indiaenvironmentportal.org.in/category/thesaurus/cyprus
[14] http://admin.indiaenvironmentportal.org.in/category/thesaurus/greece
[15] http://admin.indiaenvironmentportal.org.in/category/thesaurus/italy
[16] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-pollution-control
[17] http://admin.indiaenvironmentportal.org.in/category/thesaurus/who
[18] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health-effects