Direct air capture: Will sucking carbon from air ever really help tackle climate change?

Humanity has spent the past 250 years or so releasing ever greater amounts of carbon dioxide into the atmosphere – a state of affairs that must be reversed if we are to get to grips with climate change. Removing CO2 from the atmosphere, in a process called direct air capture (DAC) has been on the cards for some time, but finally, after years of research and small-scale pilot projects, giant carbon-sucking facilities are becoming a reality. The…