The United States and the European Union vowed to reduce global emission by 50 per cent by the year 2050 and agreed to promote an "ambitious and comprehensive" international climate change agreement in Copenhagen.

At the conclusion of the US-EU 2009 Summit, both sides also agreed to achieve the goal of a world free of nuclear weapons and fight protectionism.

The US and EU, which account for over half of world's GDP, in a joint declaration agreed to promote an ambitious and comprehensive international climate change agreement at the upcoming Copenhagen Climate Change Summit.

"Together, we will work towards an agreement that will set the world on a path of low-carbon growth and development, aspires to a global goal of a 50 per cent reduction of global emissions by 2050, and reflects the respective mid-term mitigation efforts of all major economies, both developed and emerging," it said.

Following up on the G-20's declaration at Pittsburgh, the joint declaration said: "We commit to remain vigilant to take actions to assure a strong recovery and to plan for cooperative and coordinated exit strategies to be implemented once recovery is ensured." The US and EU are committed to undertake financial regulatory reforms to improve the resilience of the financial system to prevent future crises, create a 21st century global economic architecture, and address pressing global challenges including energy security and climate. The statement said: "We will lead by example by respecting our G-20 commitments to refrain from raising or imposing new barriers to trade and investment. We are committed to supporting efforts by the WTO and other international institutions to monitor new trade barriers with a view to increasing transparency in global trade." Expressing support for the entry into force of the Comprehensive Test Ban Treaty, the declaration called for the start of negotiations on the Fissile Material Cut-Off Treaty in January 2010.

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