Very simply, climate-smart agriculture aims to produce more food on less land, and with a minimal environmental footprint. This principle needs to be applied across landscapes- crops, livestock, forests, and fisheries- to be effective. Guided by this approach, we are working with farmers in Ethiopia, Malawi, and Vietnam to implement productive, climate-resilient agriculture ecosystems that also help mitigate climate change by reducing emissions and potentially capturing carbon. This is especially important, because aside from being the sector that's most vulnerable to climate change, agriculture is also a major cause. Research finds that agriculture, together with the deforestation associated with land conversion, accounts for about 30 percent of greenhouse gas emissions. Scaling up agricultural productivity in a way that mitigates climate and allows more people to be fed could be transformative.