Yes, but so have you. That is why there is debate - there is no middle ground on the subject with any of you guys.
I for one have said point blank to everyone in here who has asked me, that it has been some of both man and nature, and always will be. The natural forcings were very prominent early in the 20th century, but simply haven't been as important for the past 60 years.
It shouldn't be difficult for anyone to understand...there are many factors that affect the climate, and the sum magnitude is what determines the trajectory of our climate. The largest trending forcing right now, is man-made pollution which is enhancing the greenhouse effect. We have satellite measurements to back that up, as well as ground based measurements. We have spectroscopic measurements that unequivocally point to industrial combustion as the source of the growing atmospheric concentration of many greenhouse gases, and in some cases man made sources are the only source of the greenhouse gases.
It's really that simple. This year has been one of the hottest years we've recorded, and may end up the hottest year when all is tallied. Yet it has come in a year when the solar forcing is at a century low.