this action must begin now with the increasing intensity of climate change impacts building resilience will become ever more difficult delaying the transformation of the agricultural sectors will force poorer countries to fight poverty hunger and climate change at the same time wide adoption of practices such as the use of nitrogenefficient and heattolerant crop varieties zerotillage and integrated soil fertility management would boost productivity and farmers incomes and help lower food prices by one estimate the number of people at risk of undernourishment in developing countries in could be reduced by more than million through widespread use of nitrogenefficient crop varieties alone