Question

How do manure piles contribute to carbon dioxide issues?

1) They produce carbon monoxide gas.
2) They produce methane gas.
3) They produce nitrous oxide gas.
4) They produce ammonia gas.

Answer 1

Manure piles primarily contribute to carbon dioxide issues by producing methane gas, a potent greenhouse gas. The anaerobic decomposition of organic matter in manure releases significant amounts of methane, affecting biogeochemical cycles and contributing to global warming.

Step-by-step explanation:

Manure piles contribute to carbon dioxide issues primarily by producing methane gas (CH4), a potent greenhouse gas. As organic matter in manure breaks down under anaerobic conditions, it releases methane into the atmosphere. This process takes place in landfills, anaerobic composting, and livestock manure management systems. Methane is 21 times as effective per molecule at trapping heat in the atmosphere compared to carbon dioxide, significantly contributing to the enhanced greenhouse effect.

While the direct burning of manure and other biomass also produces carbon dioxide, the primary issue with manure piles is methane. Additionally, agricultural practices related to livestock contribute to the release of both carbon dioxide and methane, further impacting carbon biogeochemical cycles and exacerbating global warming.