text:  Let's turn to Cambodia now, where 10 activists from an environmental group that's campaigned against destructive infrastructure projects and alleged corruption have each been given six-year prison sentences on charges of conspiring against the state. Some received an extra two years after being convicted of insulting Cambodia's king. The activists all deny the charges, which they say are politically motivated. Our Asia-Pacific regional editor, Celia Hatton, told us more about the activists and why these cases had been brought against them.