Which phrase describes naturally released pollutants from natural sources such as volcanoes, lightning, forest fires, and plants?

Which phrase describes naturally released pollutants from natural sources such as volcanoes, lightning, forest fires, and plants?

• A. Industrial emissions
• B. Natural emissions
• C. Biogenic emissions
• D. Anthropogenic emissions

Answer: (B)

Pollution sources are categorized by origin: natural versus human-caused. Natural emissions describe pollutants released by processes in the Earth's system without human action, including gases from volcanoes, reactions sparked by lightning, smoke from forest fires, and compounds released by plants. Biogenic emissions focuses specifically on substances produced by living organisms, such as plant-emitted volatile organic compounds, and wouldn’t fully cover non-biological natural sources like volcanoes or lightning. Industrial and anthropogenic emissions point to pollution from human activities. So the phrase that best fits the described natural sources is natural emissions.

Pollution sources are categorized by origin: natural versus human-caused. Natural emissions describe pollutants released by processes in the Earth's system without human action, including gases from volcanoes, reactions sparked by lightning, smoke from forest fires, and compounds released by plants. Biogenic emissions focuses specifically on substances produced by living organisms, such as plant-emitted volatile organic compounds, and wouldn’t fully cover non-biological natural sources like volcanoes or lightning. Industrial and anthropogenic emissions point to pollution from human activities. So the phrase that best fits the described natural sources is natural emissions.