Agence France-Presse: Climate change is already threatening more than a quarter of Switzerland’s farmland with frequent and lengthy water shortages, according to official research published Tuesday. The Swiss federal agricultural research station Agroscope said about 10 times more land would need to be irrigated to avoid lost harvests, some 400,000 hectares (988,000 acres) instead of the 38,000 hectares that currently receive regular irrigation. But researcher Jurg Fuhrer told AFP that such huge …