Answer:
geological processes
Step-by-step explanation:
Global demand for Earth’s limited fossil fuel reserves has risen since the beginning of the Industrial Revolution. Fossil fuels are considered a nonrenewable resource because they are being used up much faster than they can be produced by geological processes.
When fossil fuels are burned, carbon dioxide is released into the air. Increasing use of fossil fuels has led to elevated levels of atmospheric CO2
Deforestation—the cutting-down of forests—is also a major contributor to increasing CO2
Trees and other parts of a forest ecosystem sequester carbon, and much of the carbon is released as CO2 if the forest is cleared.
Some of the extra CO2 produced by human activities is taken up by plants or absorbed by the ocean, but these processes don't fully counteract the increase. So, atmospheric CO2 levels have risen and continue to rise. CO2 levels naturally rise and fall in cycles over long periods of time,