"Trees for Life was launched in 2006, a joint project from the Olive Co-operative Ltd in Manchester and Zaytoun, a community interest company and member of Co-operatives UK. In the first six months the campaign had raised £20,000 to plant more than 5,000 olive tree saplings in Palestine..."
Greater Nottingham Co-operative Party have adopted this campaign with some vigorous fund raising activity. You can read about it at their website.