Of course we have some influence. If you run in one direction, you give the entire earth a counter nudge in the other direction, just not a very big one.
If only there were some . . . natural explanation for falling and rising temperatures.Scientists prematurely sidelined the behaviour of the principal engine of heat on earth. We've had climate change before:
Such a hypothetical source of warming would have to be massive, however. On the order of magnitude of our own Sun. (Ace of Spades commenter).