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This low level of life satisfaction is a breeding ground for populism and the lack of social trust is behind the political success of the far right.

The area beside Bloody Bridge Valley, where firefighters tackled a two mile long fire, is a "very important" breeding ground for skylarks.

The region has also experienced outbreaks of malaria, exacerbated by the floods which leave pockets of standing water that act as breeding grounds for the mosquitos that carry the disease.

In many ways, Southern California is a breeding ground for aspiring musicians.

Vector control officials are warning that swimming pools in Altadena and the Pacific Palisades could turn into breeding grounds for disease-carrying mosquitoes.