TechnologyLargest plane yet tested with hydrogen-powered engine Aerospace company ZeroAvia successfully tested using a hydrogen-electric engine to power one of the propellors in a 19-seat aircraft 51¶¯Âþ
EnvironmentGreenhouse gas levels have hit yet another record – here's why Carbon dioxide, methane and nitrous oxide reached record-high concentrations in the atmosphere in 2021, including the largest recorded increase in methane 51¶¯Âþ