Living systems consist of organisms interacting with their environments. The carbon cycle is an example of a living system. Assuming the carbon cycle is a closed system, which of the following statements is true? A. The Sun absorbs energy from the carbon cycle. B. When all the fossil fuels are used up, there will be no more carbon. C. Mass and energy are conserved in the carbon cycle.

Explanation:

What are the different pools and fluxes of carbon? Why are they important? This page provides a compilation of information and relevant links to help answer some of these questions.

The Carbon Cycle: What is the Carbon Cycle? What is the fast and slow cycle and how are they influenced?

Carbon Measurement Approaches and Accounting Frameworks: Approaches and methods for carbon stock and flow estimations, measurements, and accounting

The North American Carbon Cycle: The latest (2018) assessment and budget

Webinar Series Videos: 'The State of the Carbon Cycle: From Science to Solutions'

The Global Carbon Budget : The Global Carbon Budget as calculated by a global group of scientists

Frequently asked questions and their answers: Answers to commonly asked questions such as the following are listed here: Can you quantify the sources and sinks of the global carbon cycle? How much carbon is stored in the different ecosystems? In terms of mass, how much carbon does 1 part per million by volume of atmospheric CO2 represent? What percentage of the CO2 in the atmosphere has been produced by human beings through the burning of fossil fuels?

the answer is b. 0; 4