Therefore, our global response had to be rooted in the principles and objectives of the United Nations Framework Convention on Climate Change, particularly the principle of common but differentiated responsibilities. They argued for a two-track approach, which envisaged an ambitious and comprehensive outcome for the negotiations under both the Ad Hoc Working Group on Long-Term Cooperative Action under the UNFCCC and the Ad Hoc Working Group on Further Commitments by Annex I Parties under the Kyoto Protocol. The MEPs valued the input and presentation and agreed that what was required was a unified commitment by all countries. They pointed out, however, that it was highly unlikely that an agreement would be reached. They further advised that the issue of long-term financing would present a challenge, in the light of the Eurozone crisis and the US debt, for the attainment of an agreement by all parties. They would, however, remain committed to achieving a sustainable solution.