A July 2010 Woodland Trust report demonstrates the essential part trees play in making towns and cities healthier, cleaner and more prosperous, and underlines the need to green the UK's urban landscapes. The report calls on extensive research and urban case studies from across Europe and the USA. Chief amongst its findings are: At the election the Conservative manifesto called for a national tree-planting campaign – reiterated in the coalition agreement - and also highlighted the need to create green spaces and ’plant many more trees’.