Domestic flights will no longer be used to transport letters by Germany’s national postal carrier. The move from Deutsche Post reflects the declining significance of letter mail and allows it to improve its climate footprint. After 63 years, the last planes carrying letters between northern and southern Germany, operated by Lufthansa unit Eurowings and Tui Fly, flew overnight on 28 March on the Stuttgart-Berlin, Hannover-Munich and Hannover-Stuttgart routes. Letters between those destinations will now be transported by road, allowing the company to reduce transport-related carbon dioxide emiss…