Tertiary sources

http://www.telegram.com/static/fire/ and http://burningissues.org/table2.htm come from the topic SMOKE in wikipedia.

http://web.ebscohost.com/ehost/detail?vid=8&hid=102&sid=a113a16f-e733-4290-9783-457b8d653da9%40sessionmgr108 from Ebscohost

http://web.ebscohost.com/ehost/detail?vid=17&hid=102&sid=a113a16f-e733-4290-9783-457b8d653da9%40sessionmgr108 from ebscohost. talks about the measures firefighters take to protect themselves from the smoke in fires

http://airnow.gov/index.cfm?action=smoke_fires.main from google and it calls for prevention from forest fires smoke.

http://www.ext.colostate.edu/pubs/natres/06307.html from google and tells what the vegetation effects after fire are.