Final answer:
Human activity can affect the carbon cycle through the burning of fossil fuels, deforestation, and changes in land use.
Step-by-step explanation:
Human activity can affect the carbon cycle in several ways. Firstly, the burning of fossil fuels releases large amounts of carbon dioxide into the atmosphere, contributing to the greenhouse effect and global warming. Deforestation, which often occurs due to human activities such as agriculture and urbanization, reduces the number of trees that can absorb carbon dioxide through photosynthesis. Additionally, changes in land use, such as converting forests into farmland, can alter the natural carbon cycle by disrupting the balance between carbon storage and release.
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