‘I wanted to see if the plants could contribute something,” says Hito Steyerl, sitting in the office of her Berlin gallery. “I feel it’s a good idea to take humans out of the equation a bit.” Described as a post-internet artist – someone who uses the tools of digital technology to tackle broader social issues beyond web culture –Steyerl is credited as the creator of one of the works in Dear Earth: Art and Hope in a Time of Crisis, a new group show at London’s Hayward Gallery. But in a way the true creative force behind the piece, called...