As polar bear attacks on humans increase due to the animals spending more time on land as Arctic sea ice declines, researchers are developing non-lethal conflict-reduction tools to protect both people and bears. Scientists are testing a radar system, dubbed "BEARDAR", which can detect polar bears on the landscape and issue alerts to local authorities. The system could also remotely trigger deterrents, such as flashing lights or loud noises, and a warning system that notifies pedestrians when they are in close proximity to a bear. Polar bear hunting is a critical source of revenue to northern communities, with pelts selling for around $5,000.