This is demonstrably not correct. Plain common sense should tell you that if you burn something, it will produce substances that are not present without pyrolysis, and these are probably not good for your health if you inhale them. Since you insist on scientific proof, however, you can find it easily. My collection of papers is back home, but a quick Google search turns up this one immediately:
Vaporization as a Smokeless Cannabis Delivery System: A Pilot Study (DI Abrams, HP Vizoso, SB Shade, C Jay, ME Kelly and NL Benowitz, Clinical Pharmacology & Therapeutics, Advance online publication, 2007)
This particular study shows that vaporization eliminates CO, which I think you'll agree is harmful to your health. There's also the oft-cited Gieringer paper:
Cannabis “Vaporization”: A Promising Strategy for Smoke Harm Reduction (DH Gieringer, Journal of Cannabis Therapeutics Vol I No. 3/4, 2001)
I've posted criticism of this study here on several occasions, but not for its documentation of the reduced hazards of vaporization. It has a casual reference in it to the appearance of toxins at 200°C that is unsupported but is often quoted as fact. This paper shows that vaporization substantially reduces tars (which are carcinogenic). Gieringer participated in a later study:
Cannabis Vaporizer Combines Efficient Delivery of THC with Effective Suppression of Pyrolytic Compounds (Gieringer, D., St. Laurent, J., and Goodrich, S. Journal of Cannabis Therapeutics, Vol. 4(1) 2004)
This study confirms the reduction of the harmful products that result from combustion.
There are several studies that show combustion of marijuana produces harmful toxins. There are none that show that vaporization produces significant amounts of toxins, while there are some (see above) that document significant reduction or complete elimination of pyrolysis toxins. You are entitled to you attachment to a more harmful method of ingestion, but please don't make easily refuted assertions about the obvious benefits of vaporization over smoking.