I thought water vapors called simply as clouds mostly influence greenhouse effect.
Anyone who believes that 25,000 terawatyears energy that the Earth gets from our star Sun annually, can be even slightly affected by humanity's output of 25 terawatyears annually (burning oil, coal and nuclear fuel), has not properly studied mathematics, biology and physics.
Of course the amount of heat produced by humans as you note is of practically no consequence. No one is claiming that. It's water vapor and CO2 and other greenhouse gases slowing down the loss of infrared radiation emitted by the Earth after it absorbs energy from the visible light from the Sun that is causing the heating.
It becomes clear that your climate science denialism is driven by your fear of possible economic consequences from responding to the problem more than any understanding of science. You also ought to consider the possible economic consequences if the climate scientists are right.
Global warming happens, no doubt about that, like global cooling. Every day and night. By some 15-20 degrees of Celsium. Where are climate fear-mongers explaining how that is possible?
Cute. The obvious answer is the Sun heats the day side of the planet and on the night side energy is being lost to the black sky. But that is a cycle that's been going on for the whole 4.5 billion years of the planet's existence and has never been a cause of climate change. For individual places on Earth it varies seasonally but repeats year after year and on a long term basis (tens of thousands of years) it varies due to the Milankovitch cycles but when you're talking about a climatologically significant period (30 years) it has essentially no effect.