Climate change is it fact or fiction?

I find myself more in the camp that there has been climate change or it is in flux as we speak. Given how man abused the Earth during WWII for close to five years, more or less, and still didn’t destroy the Earth with all that fuel and wreckage laid waste in the ocean. I am not all the way there because I have experienced some climate change in the area I live in from when I was a child. I remember when October hit it was fairly wet and cold, especially near Halloween. The big question was will it be dry for Tricks or Treat. The rain usually started in late Sept. If there was an Indian Summer, it was not long. The last 3 years I have observed women were still in shorts at the beginning of October (great for those who look good in them, bad to have to suffer through those who should never have been in shorts in the 1st place); this year even with half of October gone there were still women in shorts (no……I don’t notice the dudes, though they might be in shorts more also I am just not watching them). These seemingly warmer or later winters, is that man effecting climate change or has it been like that for some time and I just hadn’t notice? Without traveling the globe to see if others local climate has changed how do one really know if climate change due to man is true or just what people want to believe?