Agence France-Presse: Wealthy nations are shirking their duty to take a strong lead in fighting global warming, the UN’s top climate official said Friday, a day ahead of a G8 meeting of environment ministers in Kobe, Japan. “We really need a push now from G8 countries to show leadership,” said Yvo de Boer, Executive Secretary of the United Nations Framework Convention on Climate Change (UNFCCC). Industrialised nations must show how they intend to engage major developing economies such as …