Delhi Pollution Control Committee (DPCC) has countered claims that PM 2.5 (fine, respirable particles) pollution in Delhi is higher than in Beijing.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/dpcc-counters-high-pollution-claim
[2] http://admin.indiaenvironmentportal.org.in/category/author/jayashree-nandi
[3] http://admin.indiaenvironmentportal.org.in/category/newspaper/times-india-new-delhi
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/delhi
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-pollution
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/delhi-pollution-control-committee-dpcc
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/beijing
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health-effects
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/rspm-pm-10
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/cse-study
[11] http://admin.indiaenvironmentportal.org.in/category/thesaurus/cng
[12] http://admin.indiaenvironmentportal.org.in/category/thesaurus/urban-air-quality