In part. We've been in a warming trending since the 17th century. That's natural. However, the extent of the increase and the rapidity of the increase are logically due to the extraordinary amounts of fossil fuels burned during the English and American industrial revolutions. We are and have been, in effect, short-circuiting a natural process (in addition to all the other damage we've done).
Sorry db but no, there is no natural warming trend since the 17th century. Essentially all the warming over the last two hundred years is from man.
There is no reason to believe that the warming trend which began four hundred years ago would have stopped two hundred years ago if man had not made his own contribution. It is more logical to assume that man's contribution exacerbated the warming trend already in place.
The warming trend that began as the Little Ice Age drew to a close. The one is coincident with the other. Otherwise we'd still be in an ice age.
Oh, but that is a very long term trend. Over the last thousand years the trend has generally been down as per the above chart I posted. There really is no natural component to the more relevant shorter term trend over the last two hundred.