World leaders may face an unexpected challenge come June, when a major global summit on sustainable development will be held in Brazil....“We are really tired of declarations,” Antonio Herman Benjamin, judge of the Supreme Court of Brazil, told an international gathering of legal experts here Monday. Despite some progress made since the 1992 Earth Summit held in Rio de Janeiro, Brazil, most governments have failed to fulfil their obligations. As a result, the court has launched a new initiative to promote role of law in advancing sustainable development. It is known as the World Congress on Justice, Governance and Law for Environmental Stability.