With traffic ceasing almost completely all areas saw steep drops in nitrogen oxide levels.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/air-pollution-levels-plunge-99-jerusalem-tel-aviv-over-yom-kippur
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/jerusalem-post-israel
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-pollution
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/israel
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/vehicular-pollution
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/oxides-nitrogen-nox
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health-effects
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/transport
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/respiratory-diseases