Zambia's tax revenues will be hit badly in 2009 unless copper prices rebound, the country's revenue authority (ZAR) was quoted as saying on Wednesday.In April, the government introduced a windfall tax at 25 percent and profit variable tax at 15 percent above eight percent earnings, hoping to raise $415 million additional revenue in 2008 from the copper mines, but these efforts were dashed with plummeting copper prices.ZAR's Commissioner General Chriticles Mwansa told state media that tax...