EarthCould natural hydrogen from underground help the UK get to net zero? Rocks in some parts of the UK have the potential to produce natural hydrogen, but it remains unclear whether the gas is present in economically viable quantities ¿ìè¶ÌÊÓÆµ
EnvironmentCould reusable rockets make solar geoengineering less risky? Injecting aerosols into the atmosphere – but at higher altitudes than planes can reach – could cool the climate while avoiding some of the downsides of lower-altitude solar geoengineering ¿ìè¶ÌÊÓÆµ