Why is the amount of carbon dioxide in the atmosphere currently increasing? ozone hole burning fossil fuels photosynthesis cutting down of tropical rain forests

There are so many examples for that in different areas, like biology experiment carried out in our lab recently.

Here's one link : https://www.creative-biogene.com/symbolsearch_CRE.html

step 1: nitrogen fixation- conversion of atmospheric no₂ into forms useful to plants by lightning, bacteria, and cyanobacteria.

step 2: nitrification-process of converting ammonia to nitrite or nitrate.

step 3: assimilation-plant roots absorb new form of nitrogen.

step 4: ammonification-conversion of organic nitrogen to ammonia by bacteria involved in decomposition.

step 5: denitrification-bacteria turns the decomposed matter back into n₂o, which is released into atmosphere; repeat cycle.