Final answer:
Humans have altered the carbon cycle through activities like burning fossil fuels, deforestation, and land use changes, resulting in increased atmospheric carbon concentrations.
Explanation:
Humans have altered the carbon cycle significantly through various technological advancements. The burning of fossil fuels, deforestation, and land use changes are key ways in which humans have increased carbon dioxide emissions, disrupting the natural balance of the carbon cycle. This disruption leads to increased atmospheric carbon concentrations, which contribute to climate change and global warming.
Learn more about Human impacts on the carbon cycle
