Xinhua: Bolivia’s President Evo Morales said Saturday that he will not sign the final declaration of the 5th Summit of the Americas, if leaders do not agree to review clauses aimed at stimulating the development of biofuel. The meeting in Port of Spain, Trinidad and Tobago, which brought together leaders from 34 countries across the Americas, concludes on Sunday with the signing of the Declaration of Port of Spain. “If the issue of biofuel is not reviewed, the government of Bolivia …