It’s called the forgotten greenhouse gas. You know, nitrous oxide (N2O), the magic behind whipped cream. You might not know it’s 300 times more potent than carbon dioxide and represents 9% of all greenhouse gas emissions. Its longevity in the atmosphere provides a potentially more damaging legacy than CO2, reports the University of East Anglia. Currently, agriculture and wastewater treatment industries account for 80% of global emissions (from bacteria that make N2O from nitrogen-rich fertilizers, and from bacteria in wastewater treatment). Now the Nitrous Oxide Focus Group is convening to examine sources and sinks of N2O in the environment, its role in climate change, and to develop techniques to mitigate its effect.
Julia Whitty is Mother Jones’ environmental correspondent and 2008 winner of the John Burroughs Medal Award. You can read from her new book, The Fragile Edge, and other writings, here.