We in fact have plenty of evidence, in that those who have been gathering and compiling the "evidence" have faked some of it and either buried or destroyed contravening evidence. Moreover, speaking of flawed logic, saying that man has an impact provodes zero evidence, in and of itself, that the effect is what you claim it to be.
But all of that is a deflection and distraction from your invocation of flawed logic in the first place.
Try harder.
Okay, how about this. Go to your garage, bring with you a garden hose and put one end in the tailpipe of your car, and the other end in a rear window. Then roll all the windows in the car up, and the rear one as high as possible, filling any gaps with towels.
Next, close the garage door with your remote, start the car, and turn on Rush Limbaugh.
As you become sleepy, simply think of the words of your teacher, think to yourself, "I'm getting sleepy, very sleepy...
Oh, but before you do this, list all of the reasons you believe man has had no impact on our planet. But do so before you try the experiment.