Cardiff has lost 34 hectares of trees in recent years.  Cardiff Civic Society is trying to address this with its urban tree planting project - Canopy Caerdydd -  to be launched at The Gate Arts Centre on October 6.  Renowned urban tree expect, Cambridge-based Keith Sacre, will be giving a talk on the importance of urban tree cover for our health and well-being, and to carry out important functions such as absorbing air pollution, providing oxygen, and soaking up excess water falling rainstorms.