theories: carbon cycle

The carbon cycle describes how carbon moves through Earth's systems. It involves processes like plants absorbing carbon dioxide during photosynthesis, animals and humans releasing it through respiration, and carbon converting into fossil fuels over millions of years. Carbon can also dissolve in oceans, or be stored in rocks and soils. This cycle helps regulate Earth's climate by balancing carbon levels in the atmosphere, ensuring that carbon dioxide remains at a stable level. Human activities, like burning fossil fuels, can disrupt this balance, leading to increased greenhouse gases and climate change.