Africa News Tonight: Ghana prepares for elections, Biden backs Africa rail project, biochar helps farmers and climate

There is a positive pre-election mood in Accra as Ghana prepares to hold its presidential and parliamentary elections on Saturday. President Joe Biden met with workers in Angola and spoke with leaders about what the president called the largest U.S. investment in a railway project outside America. Biochar has been used for years as soil enrichment, but research on its properties and potential benefits have recently gained the attention of foresters and agricultural producers, because it can help reduce climate change and enhance crop yields.