Carbon cycle important for living beings - Eschool
How does carbon get into living things? - Quora
Ranching For Profit - "All living things contain carbon and are part of a carbon cycle. There are inputs and outputs, or 'sources' and 'sinks' in every carbon cycle, including beef production.
All living things on Earth contain carbon. But, what is carbon - ppt download
Carbon cycle | National Oceanic and Atmospheric Administration