Most cyclists have been there: peacefully pedaling one minute and sucking bus exhaust the next. In the moment, all you can do is keep riding and shrug off the blast of smoke.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/does-air-pollution-reduce-cycling%E2%80%99s-health-benefits
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/national-geographic-news
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-pollution
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health-effects
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/pm-25
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/cycles
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/vehicular-pollution