Agence France-Presse: Australia’s climate negotiator is urging nations to show their cards at ongoing Bonn talks, warning the fight against global warming will falter unless governments commit to clear — but realistic — goals. Climate Minister Penny Wong visited Washington, where she welcomed US President Barack Obama’s push on global warming along with new legislation introduced in Congress on curbing carbon emissions. In an interview with AFP late Tuesday, Wong said the talks in Bonn — part of …