Delegates meeting this month in Durban, South Africa, to assess international progress on tackling climate change need to look beyond smoke stacks and car exhausts to a neglected source of emissions -agriculture.That's the message from an international group of leading agricultural and climate scientists in a report published on 16 November. They say that agriculture is the "single largest contributor to greenhouse-gas pollution on the planet", through routes such as deforestation, rice growing and animal husbandry (see 'Farming footprint'). Emissions include nitrous oxide from fertilizer and methane from livestock, as well as carbon dioxide.
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