A lot of it does have to do with man-made GW. So far the oceans have been able to absorb much of the increased warming, etc. Also, the oceans have been taking in quite a bit of CO2. All of which plays some semblance to the increased warming. Sure it is not all global warming, some of it has to do with the expanding urban footprint, etc. Also, some is cyclical. How much? That is debatable. After spending my career thus far earning a PhD and studying blacklegged ticks and Lyme Disease, I can tell you the tick isn’t moving north and up mountains because of human migration, but rather the climates are opening up to them. Regarding the whole GW debate, one thing that always boggles my mind is how people think we have a minimal impact on the planet. There are 7.6 billion humans on the planet, all of whole use heat to cook, heat homes, energy for AC, energy for transportation etc. even the worlds poorest burn to cook. That has to have some effect. But in the flip side the development of fossil fuels would not have allowed us to reach 7.6 billion people. However, now it is up to us to figure out how we can be good stewards to our home planet. Science has been a miracle.