Barra's Return of the Wild

From the rivers of Northern Ireland to the slopes of Spain, Barra Best discovers how passionate individuals across the Europe and the UK are helping species and environments under threat.

In Northern Ireland, Barra meets the team investigating the promising possibility that a slippery substance found in plentiful supply around the country's coast could help reduce the methane output of cows – a major agricultural source of greenhouse gases.

From Slovenia to south-west County Kerry, Barra Best uncovers how passionate people across the UK and Europe are helping bring endangered species and environments back from the brink of extinction.