I have no doubt that the earth is warming, I can remember when we has 6" of ice on the river and ponds at home and were ice skating before thanksgiving, and the ranches with ice houses were cutting ice and stacking it away for simmer use in an ice box as we had no electricity away from the citys.
The days are hotter this summer here that it has ever been in the 10 years I been here, just 3 years ago 101 was a record and this week was 105,
But that is nothing that hasn't happen before, tho maybe 200K years ago. but for the last 30, 20,000 for sure it has been in a warming trend and do not know how far it will go, doesn't seem to be in any history found in studies how hot it got before the last ice age, but we will find out and then will find out how long it takes for the ice to form again,
this is a regular cycle for the earth and it will all happen again, at least it will unless some screwball pushes the wrong button.
Man might be making it happen a little faster, maybe not, but it will happen man or no man. we are just not that important in the scheme of things..