Question 12

While carbon dioxide dominates global warming discussions, nitrous oxide-a byproduct primarily of agricultural activities-poses a unique and formidable challenge. Often overlooked, this gas is roughly 300 times more effective at trapping heat than carbon dioxide. Its primary source is not a centralized industrial chimney that can be capped or filtered, but rather the vast expanses of fertilized farmland worldwide. When nitrogen fertilizers are applied to boost crop yields, soil bacteria convert the excess nitrogen into nitrous oxide, which then seeps into the air. This diffuse nature makes emission control extremely difficult compared to point-source pollution. Moreover, the gas persists in the atmosphere for over a century, meaning today's emissions will influence the climate for generations to come. Researchers suggest that without significant changes in global farming practices and fertilizer efficiency, climate targets will remain out of reach, regardless of the progress made in the renewable energy sector. What point does the author make about nitrous oxide emissions?