New York (UN)  -  The world economy is projected to grow by 2.9 percent in 2016 and 3.2 percent in 2017, supported by generally less restrictive fiscal and still accommodating monetary policy stances worldwide, a UN report said.Global growth is estimated at a mere 2.4 percent in 2015, marking a downward revision by 0.4 percentage points from the UN forecasts presented six months ago, according to the World Economic Situation and Prospects 2016 report.