The industry is turning to robot harvesters, hydroponic tabletop farming and other developing technologies to address some of those challenges.

The commission has created a collection and distribution system to supply traditional foods to schools, built partnerships with producers and harvesters strengthening the local food system, and enhanced connections to traditional foods and practices.

The festival organiser from Brecon said the sky "turned brown" with the wasps after a local farmer's combine harvester disturbed a nest in a field.

For more than 20 years, salmon caught outside their typical range have been recorded by subsistence harvesters who target other Arctic species, including Dolly Varden and Arctic char.

Currently, there has been much interest in using piezoelectric nanogenerators -- devices that convert mechanical vibrations, stress, or strain into electrical power -- as acoustic energy harvesters.