Namibia's economic growth is expected to accelerate to 2.2 percent this year from an estimated 1.6 percent growth in 2016, supported by higher commodity prices, Finance Minister Calle Schlettwein said on Friday. "We expect improvement due to rising commodity prices although some of the revenue increases might be offset by an (unfavourable) exchange rate. There is renewed interest in exploration projects especially Lithium," Schlettwein said.-Reuters