Curtailing emissions of methane, which today contribute about half as much to greenhouse warming as CO2, may provide more than one wedge: needed is a deeper understanding of the anaerobic biological emissions from cattle, rice paddies and irrigated land.

• 今天，甲烷对于温室增温的影响，几乎相当于二氧化碳的一半，因此减少甲烷排放也可能提供一块以上的楔形：我们需要更深入了解来自家畜、稻田及灌溉田地的厌氧生物气体排放。