The European Union's top climate official said Thursday that China should stop building new coal-fired power plants and contribute to a global fund to help poor countries affected by climate change. Wopke Hoekstra, the EU climate commissioner, raised both issues in what he called intensive and open conversations with his Chinese counterparts ahead of U.N. climate talks opening in Dubai at the end of this month. Europe and the U.S. have been arguing that wealthier emerging economies such as China and Saudi Arabia should also give money to the fund.