Question

Humans become part of the carbon cycle when they

A. breathe in carbon dioxide,
B. release carbon as a waste product,
C. produce new carbon compounds in their cells,

Answer 1

Human activities have a tremendous impact on the carbon cycle

Step-by-step explanation:

Burning fossil fuels, changing land use, and using limestone to make concrete all transfer significant quantities of carbon into the atmosphere. ... The ocean absorbs much of the carbon dioxide that is released from burning fossil fuels.