Press Association: Model Lily Cole launched a campaign yesterday to save one billion trees in the Amazon rainforest. The Cambridge University student, 21, was in Kew Gardens, south west London, to promote the Sky Rainforest Rescue campaign, a project aimed at preserving more than three million hectares of trees in Acre, north west Brazil. The three-year scheme, run by broadcaster Sky with the conservation body WWF, working with the state government of Acre, aims to provide economic incentives for …