Carbon dioxide is not the only emission that must be reduced in order to meet global climate targets. Around a quarter of emissions come from other sources, including methane, nitrous oxide, fluorinated gases and various aerosols. So what are attractive strategies for integrating the reduction of non-CO2 emissions into long term climate policy?
There’s a lot of talk about carbon dioxide. But what about the other emissions? Nitrous oxide is produced during various processes including wastewater management. Human activities emitting methane include livestock farming and leaks from oil and natural gas systems. And fluorinated gases are used as substitutes for ozone-depleting substances (e.g. as refrigerants) and are emitted through a variety of industrial processes such as aluminum and semiconductor manufacturing.