Environmentalists blame factories and coal plants for CO2 emissions.
Except this isn't the first time in human history there was human caused climate warming.
One of the many biblical catastrophes of the bronze age collapse was that there was regional warming.
The climate was slowly getting warmer and warmer until nearly all crops in the region couldn't survive.
There were extreme weather conditions as a result of this change in climate.
Except that it was a preindustrial civilization.
It doesn't make sense that they would be having the same problems as we are today without factories.
Something that we had in common with the bronze age was a population explosion.
So I decided to check the carbon emissions of human respiration which is about 2.3 lbs of CO2 per day.
Multiply that by 365 and you get 839.5 lbs per year.
Multiply that by 8 billion and you get 6,716,000,000,000 or 3 billion tons per year.

Notice how the blue line started to go down for a bit after the world wars?
I noticed.
It's measuring how much humanity is breathing.
If climate change is to be stopped billions would have to stop breathing.
You can talk about cows and factories and whatever inhuman entity you feel most comfortable with shifting the blame to.
You will have to recognize that humans breathing is the primary cause of climate change.