Nick Parker, Executive Chairman of the Cleantech Group offers ten trends in clean teach for 2010: Here are the group's predictions for 2010: 1. Private capital growth recovers, record fund year. Global cleantech venture capital flows receded to around 2007 level but in the U.S., cleantech pulled ahead as the largest single venture investment theme in 2Q09 and 3Q09. 2. Clean economies become th…