To control climate change, the world must go beyond cutting carbon dioxide emissions and curb lesser-known pollutants such as nitrous oxide playing a key role in warming the planet, new research suggests.
Decades of global climate discussions have focused on CO2 emissions, which are most abundant in the atmosphere. The common goal of reaching "net-zero" emissions refers most often to CO2 emissions alone.
"When we're worried about the near-term … we need to look at the other non-CO2 climate forcers," said study co-author Durwood Zaelke, president of the Institute for Governance & Sustainable Development in Washington DC. Scientists say these sulphates are masking about 0.5 degree Celsius of warming that would be seen without them, meaning aggressive climate action could see temperatures temporarily jump higher – unless the lesser pollutants are tackled as well.
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