Water vapor comprises 95% of the “greenhouse” gases in the earth’s atmosphere. All human activity accounts for 0.0001% of water vapor in the earth’s atmosphere.
Carbon Dioxide comprises 3.618% of “greenhouse” gases in the earth’s atmosphere. All human activity accounts for 0.116% of carbon dioxide in the earth’s atmosphere.
All other gases (Methane, Nitrous Oxide, CFCs, etc) account for 1.382% of “greenhouse” gases. All human activity accounts for 0.16% of these gases in the earth’s atmosphere.
Total contribution of all human activity to “greenhouse gases” is 0.28%.
The mass of all life on earth is 560 billion metric tons, or 9.33 x 10^-9% of the earth’s mass.
The mass of all humans on earth is 0.350 billion metric tons, or 5.83 x 10^-12% of the earth’s mass, or 0.0625% of the mass of all life on earth.
In terms of earth’s climate, all life is round off error, and human life is the decimal dust of the round off error.
The climate of earth is a function of solar irradiance, and geologic activity (including radioactive decay, volcanoes, movement of the tectonic plates, earthquakes, etc.)
And yet this is never discussed.