An electric plane, built by US aerospace company Beta Technologies, recently completed a 100-mile (160km) flight in Norway, simulating a cargo route, as part of the country's move towards low-emission aviation. This showcased the potential of electric propulsion, but highlighted the need for a "revolution" in battery technology for widespread electric flight.

• The Alia aircraft has a range of 400km (250 miles) and can refuel in less than 40 minutes.
• Beta Technologies' chief revenue officer Shawn Hall believes electric propulsion is the "next major breakthrough in aerospace."
• Heart Aerospace is developing a hybrid 30-seater prototype plane capable of switching between batteries and jet fuel, with test flights scheduled for 2026.