What processes are adding additional carbon dioxide to the atmosphere?

Explanation:

When animals breathe or decompose (decay), carbonate rocks weather, forest fires ignite, and volcanoes erupt, carbon dioxide is released into the atmosphere naturally. Human practices such as the combustion of fossil fuels and trees, as well as the manufacture of cement, contribute carbon dioxide to the atmosphere.

- "the choice that is not an indicator of a chemical change is "state of matter changes". more common than not, chemical reactions produce energy in the form of light or heat. along with energy, they also produce a new substance called the product that could be in any state of matter (solid, gas, or liquid)."