GHANA aimed to plant at least 5 million trees in a single day to help regrow the country's lost forests and curb the impacts of climate change, the president said. The expansion of farming, and to a lesser degree mining and logging, has led to high levels of deforestation in Ghana, environmentalists say. Forest cover in the West African gold miner has dwindled to less than a fifth of what it was in the 1990s, according to Forestry Commission figures. At Jubilee House, the seat of Ghana's presidency, President Nana Akufo-Addo planted a seedling of lignum vitae, one of the…