I look at the temps from the 1960s and compare them with the last 20 years and there is a stark difference. It's not cycling, it's permanent.
I am also old enough to remember what things were like in the early 50s before the cleanup was happening. Black Snow, smog so bad in the mountains it could kill small children. Mud slides would go for miles because of the trees hydraulic mining done. Rivers so bad that what was left of the fish was floating dead on a sickly film. You see, I am talking about just the area I am from. From what I know, West VA was even worse.
Ike brought a lot of change and that change was also done by JFK, LBJ and Nixon to clean things up. Had we not done it, the air would have been unbreathable and a glass of water would cost a lot of money per glass. You ignore the changes that are happening in the background for the betterment of not only the human race but the planet as well. Even China is having to clean itself up today because their own people are refusing to work in such a deathly state. India is just as bad but doesn't seem to care, let them die.
We have the duty to help. No, not all is caused by Humans but we have the duty to mitigate our input to the problem. To give you an idea, are you aware that when Britain got their own Industrial Revolution (before ours) that was a mini ice age. It wasn't a coincidence that the mini ice age ended at that time. Besides, the Vikings needed the mini ice age to spread out so far and in between. It was one of the reasons that ended their life style.