Cleaned out my pipes

Bullshit.

Aside from cannabinoids in pot smoke/nicotine in tobacco smoke, the constituents in the smoke are strikingly similar:

http://www.erowid.org/plants/cannabis/cannabis_info3.shtml

The "tar" consists largely of various resins and pyrolytic products produced by burning plant material. Many of the exact same compounds would ne found no matter WHAT plant was being smoked, be it pot, tobacco, or lawn clippings...

 

alright lets get this straightened out here...yes there is tar in cannabis smoke, however less so than tobbacco.

see above what ellis D said