David Loyn has been following the debates at the United Nations food summit in Rome.nIn Ethiopia, Elizabeth Blunt meets some of the families affected by the country's food shortages.nAdam Easton in Poland reports on the workers returning there from the UK.nIn India, Chris Morris says the authorities in Delhi are struggling to cope with the increased number of cars in the city. nAnd Petroc Trelawny describes how China has fallen in love with the piano.
