This documentary gives you a crash course in fine-grained attention to the Earth.

Thousands of balloons wash up on Sable Island every year, a small strip of sand and grass in the North Atlantic Ocean. The only human occupant, Zoe Lucas, collects all those stray balloons. “Red and green for Christmas, orange for Halloween.” She sorts the ribbons, cuts the rings and counts them, and keeps a dazzling spreadsheet of everything she finds. “Sometimes it has a card with an address,” she says. “Then I write a message to those people.…