“From here, you can only go on foot,” says Zhanna Rybak, a short woman in sunglasses, stopping at a barrier. Beyond this point is a designated emergency zone, closed to civilian vehicles. Zhanna is here on a spring afternoon with a few other members of a small volunteer group called Nets, Sieve, and Shovel, to clear storm debris from the beach. Normally they'd be collecting fuel oil — but new rules require a special permit for that, and violators can face fines.