Yes the environmental impact of an AI agent performing a given task is lower. However we will not simply replace every programmer with an agent: in the process we will use more agents exceeding the previous environmental impact of humans. This is the rebound effect [0].

Your reasoning could be effective if we bounded the computing resources usable by all AI in order to meet carbon reduction goals.

[0] https://en.wikipedia.org/wiki/Rebound_effect_(conservation)

So you mean that human programmers who were replaced by AI are dead by now?

"You'll be fine digging trenches, programmer", they said.

Seriously, though:

...so that they can no longer afford traveling around the world...

This is either a sarcasm I failed to parse, or pure technofascism.

on top of that for sure all programmers AI is replacing are all extravagantly traveling around the world (especially ones in America that make the most dough and 90% do not have a passport)

>The environmental impact of AI replacing a human programmer is orders of magnitude lower than the environmental impact of that programmer. Look up average US water consumption and CO2 emissions per capita.

The programmer will continue to exist as a consumer of those things even if they get replaced by AI in their job.

But he will no longer have that much money to spend on environment damaging products.

this is genocidal, on a human-wide scale.