Climate crisis: do we need millions of machines sucking CO2 from the air?

From turning CO2 into rock to capturing the breath of office workers, a growing number of companies think the answer is yesDoes the world need millions of machines sucking carbon dioxide directly out of the air to beat the climate crisis? There is a fast-growing number of companies that believe the answer is yes and that are deploying their first devices into the real world.From turning CO2 into rock in Iceland, to capturing the breath of office workers, to "putting oil back underground", their aim is to scale up rapidly and some have already sold their CO2 removal services to buyers including Bill Gates, Swiss Re, Shopify and Audi. Prices, however, are sky high - $600 (?440) per tonne and more. Given that humans emit about 36bn tonnes a year, that is problematic. . Continue reading...