Dusseldorf / DPA Drivers slam on their car brakes, children want to play with it and impressed pensioners ask if it can carry their shopping; when delivery robot Robbie goes on test runs, everyone’s agog. The six-wheeled delivery robot, designed by Estonian firm Starship and about the size of a lawnmower, is being trialled in London, in two German cities …

  AP Energy-efficient upgrades can not only shrink your utility bill; they can increase the value of your home. Homebuyers are becoming increasingly aware of the benefits of energy-efficient homes. In fact, they’re often willing to pay more for homes with “green” upgrades, says Sandra Adomatis, a specialist in green valuation with Adomatis Appraisal Service in Punta Gorda, Florida. Just …

  DPA Mohammed Taha says he has the only “green mosque” in the whole of Egypt, and he looks around the flowerbeds where he grows spinach and Italian basil. Behind the caretaker with a prayer bump on his forehead, a yellow minaret rises up into the evening sky above Cairo. Taha’s rooftop garden in this place of worship is the …