Question

1. the carbon cycle includes two main categories of processes. some that release carbon into the atmosphere and some that act as carbon reservoirs. the diagram below shows both major process categories, and gives examples of activities for both. which of these disruptions would cause a decrease in atmospheric carbon? a reduction in the consumption of fossil fuels a decreases in populations marine biota the destruction of terrestrial biota an increase in cement production carbon output to atmosphere: organism respiration, fuel combustion, cement production; carbon reservoirs: soils and detritus, dissolved organic carbon, ocean sediments, terrestrial biota, marine biota, buried fossil fuels, rocks

Explanation:

To determine which disruption decreases atmospheric carbon, we analyze each option:

• Option 1 (Reduction in fossil fuel consumption): Fossil fuel combustion releases \( \text{CO}_2 \) into the atmosphere. Reducing consumption would decrease atmospheric carbon input, but let’s check others.
• Option 2 (Decrease in marine biota populations): Marine biota (like phytoplankton) absorb carbon. A decrease would reduce carbon uptake, increasing atmospheric carbon (eliminated).
• Option 3 (Destruction of terrestrial biota): Terrestrial plants absorb \( \text{CO}_2 \) via photosynthesis. Destruction reduces uptake, increasing atmospheric carbon (eliminated).
• Option 4 (Increase in cement production): Cement production releases \( \text{CO}_2 \), increasing atmospheric carbon (eliminated).

Only a reduction in fossil fuel consumption (less \( \text{CO}_2 \) released) decreases atmospheric carbon.

Answer:

A. A reduction in the consumption of fossil fuels