What are natural sources of greenhouse gas emissions?

Natural sources of greenhouse gas emissions refer to the processes that release gases into the atmosphere without human intervention. Volcanoes, wetlands, and wildfires are all significant contributors to natural greenhouse gas emissions.

Volcanoes emit carbon dioxide (CO2) and other gases during eruptions. Wetlands, particularly, are known for producing methane (CH4), a potent greenhouse gas, as organic material decomposes anaerobically in water-saturated soils. Wildfires are another natural occurrence that releases CO2 and other gases when vegetation burns.

In contrast, the other choices represent anthropogenic (human-related) sources of emissions. Fossil fuel combustion is primarily associated with energy production and transportation from burning coal, oil, and natural gas. Industrial manufacturing involves processes and activities that often release greenhouse gases as byproducts. Deforestation and land use change impact the natural carbon cycle and lead to increased atmospheric CO2 due to the loss of trees that would otherwise sequester carbon.

Understanding these natural sources provides insight into the broader context of greenhouse gas emissions and their impact on climate change.