Agence France-Presse: An agrarian crisis is brewing because of climate change that could jeopardise global food supplies and increase the risk of hunger for a billion poorest of the poor, scientists warned Thursday. South Asia and Africa would be hardest hit by the crisis, which would shift the world’s priorities away from boosting food output year after year to bolstering the resilience of crops to cope with warm weather, they said. Rice, the staple for billions of people, is most vulnerable to …