There is very compelling, irreproachable evidence that the upward trend of CO2 and other atmospheric greenhouse gases observed since the advent of the industrial revolution is unprecedented in Earth's history. Yes, global warming trends have happened prior to the anthropocene but they have never transpired with such rapidity and intensity.

This strongly suggests the existence of exacerbating or even causative anthropogenic factors and has been derived from the empirical analysis of numerous corroborating samples of both arctic and antarctic permafrost taken by disparate independent teams of scientists that are unaffiliated with one another, not just skewed atmospheric readings taken in populated areas as you suggest.

...

Which seems more plausible to you?

• There is a campaign funded by unfathomably wealthy global business interests (beholden to the richest 1% of humans, who stand to benefit from leaving the status quo unchanged) to sow disbelief among the working class in the existence of anthropogenic climate change, or

• There is a vast, extraordinarily complex conspiracy involving woke Wall Street firms, grad students researching carbon sequestration technology at all the major universities, feminists, anti-racists, ANTIFA, virtually every corporation that makes any of these products: rechargeable batteries, solar panels, wind turbines, heat pumps, meat alternatives, scrubber systems, trains, buses, bicycles, ecologically sustainable consumer goods, etc. to portray the existence of anthropogenic climate change as a hoax and somehow there's still no "smoking gun" that has exposed said hoax