Former US vice-president Al Gore has raised strong doubts about the European Union's ability to give global leadership, particularly on climate change - an area where the EU prides itself as setting an example to others.
"Some have speculated that sometime in the future, if the European Union actually unifies to a much higher degree, and has a president, and an effective legislative body that has real power, they might somehow emerge, with potential for global leadership. I'm not going ...
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