A United Nations report has forecast 4 percent GDP growth in Cambodia this year, the lowest figure yet among four major agency predictions. The improving global economic environment, increasing trade levels, and the reviving tourism sector have all contributed to a prediction of growth, said Amy Wong, economic affairs officer at the UN Economic and Social Commission for Asia and the Pacific. The forecast follows estimates already released by the World Bank, Asian Development Bank and International Monetary Fund of 4.4 percent, 4.5 percent and 4.8 percent respectively. The UN report, released Wednesday, expected the inflation rate this year to be about 5 percent, assuming there will be no spike in fuel prices.