If every cultist stopped breathing, problem solved.
Here’s a few more things that puts CO2 into the air:
Volcanic eruptions
Wildfires
Decomposition of organic matter (e.g., dead plants and animals)
Soil respiration
Methane emissions from wetlands
Oceanic CO2 release due to temperature changes
Terrestrial CO2 release due to temperature changes
Forest fires
Geothermal activity
CO2 released from oceans due to upwelling
Decay of submerged aquatic vegetation
Termites and other insects producing methane
Emission from plant respiration
CO2 from algae blooms
Methane emissions from ruminant animals (e.g., cows)
Carbon release from permafrost thaw
Emissions from peatlands
Rotting of fallen leaves
Decomposition of wood
Natural weathering of rocks
CO2 release during volcanic degassing
CO2 from natural water bodies (e.g., lakes)
Decomposition of corals
CO2 emissions from natural geysers
CO2 release from carbonate minerals in soils
CO2 emissions from termite mounds
Decomposition of kelp and seaweed
CO2 release from limestone dissolution
Emissions from hydrothermal vents
CO2 release from carbonate reefs
Gas exchange between oceans and the atmosphere
CO2 release from hot springs
Methane release from mud volcanoes
CO2 emissions from salt pans
Decay of submerged aquatic vegetation
CO2 from volcanic lakes
Methane emissions from swamps
Methane emissions from rice paddies
Methane emissions from natural seeps
CO2 from decaying phytoplankton
Emissions from subglacial volcanoes
CO2 release from soil erosion
CO2 from deep-sea hydrothermal systems
CO2 from thermal springs
Emissions from evaporating saline lakes
Emissions from desert sand dunes
CO2 from erosion of carbonate rocks
CO2 from hot deserts
Emissions from ocean upwelling zones
Emissions from karst landscapes
CO2 release from wildfires in grasslands
CO2 from natural oil seeps
Emissions from thawing ice sheets
CO2 release from lava flows
CO2 emissions from coastal erosion
Methane release from ocean sediments
Emissions from geologic faults
CO2 from salt marshes
Emissions from percolating groundwater
CO2 release from forest soils
Emissions from landslides
Methane release from submarine landslides
CO2 from volcanic soil degassing
CO2 emissions from decaying roots
Methane release from hydrothermal systems
CO2 from sinking plant material in water bodies
Emissions from subaerial volcanic eruptions
CO2 from the erosion of carbonate beaches
Methane emissions from fumaroles
CO2 release from natural coal fires
That should be what happens.
I always find it predictable that those that believe the world is over populated never remove themselves. Those that believe humans pollute the Earth never cut back.