Re: Why are some people still skeptical about climate change?

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You don't know a damned thing about science. You just learned propane and hydrogen turn into liquids when compressed a couple weeks ago and think cars explode when you shoot the gas tank with a gun.
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I do have to admit, T relation to P is first chapter chemistry. You know, just thinking about that. T relation to P. And that good old constant R.

if a ball of gas around a planet got hotter due to climate change, it would become ... a bigger ball...Gosh, then there would be more radiative surface area to that ball, and more of that bad greenhouse heat would escape. Wait, if that ball expanded from that bad greenhouse heat, what percent of that bad greenhouse energy went to lift molecules higher against gravity?

I don't think the mechanism that you describe is accurate. Venus is way hotter than Earth and the atmospheric pressure is 90 times that of Earth on its surface.

If I recall correctly, the upper stratosphere of Venus is highly reflective, so little IR from below gets out.

As for the pressure, a quick google search shows...

The atmospheric pressure at the surface of Venus is about 92 times that of the Earth, similar to the pressure found 900 m (3,000 ft) below the surface of the ocean. The atmosphere has a mass of 4.8×1020 kg, about 93 times the mass of the Earth's total atmosphere.

Thus the mass of air on Venus does approximate pressure. It's mostly CO2 down low, so it would be near liquid, very viscous like trying to walk underwater. Its gas envelope has reached equilibrium conditions.