‘If’ you had ‘reliable data’ from 100 years ago, and you were able
to put that data into a mathematical model to show today’s climate...
If they could do that, then they ‘might’ be able to predict the future.
The problem is twofold:
they do not have reliable data, and their mathematical models do not work.
If you go back much beyond the 20th century, there simply is no reliable data for one simple reason. Outside of expensive instruments in laboratories, there was no way to accurately measure temperature that was even close to the kind of temperature changes they are talking about. Any changes that may even have theoretically happened are well within the margin of error for the devices.
There’s plenty of data, at least relatively recently.
Google VOSTOK ICE CORE DATA
It goes back around 900,000 years. And yes, it shows we are, for a very short period, getting warmer. But it has zero, zilch, nada to do with how far you drive your suv.
It happens in cycles every 120,000 years or so.