You have to look before the ice period, that’s what OP refers to as long term.
https://scitechdaily.com/66-million-years-of-earths-climate-...
We are not heating up the earth.
The sun is heating up the earth.
That's occurring as we are adding 11 billion tonnes per year of additional insulation to the atmosphere. That's like throwing more blankets on the bed, trapping more heat.
This is well documented. The gas properties are understood and can be demonstrated in science labs to children. The gas sources are well understood and derive from documented fossil fuel extraction and confirmed by both isotope records and now by orbiting satellites.
> I'm glad that not all agree to that nonsense.
Physics isn't for everone.
But heat equations work regardless.