[en] The U.S. perspective on targets and timetables to reduce greenhouse gases was presented. While no new breakthroughs or headline-making events should be anticipated, the Unites States considers it reasonable to expect that the Conference of Parties (COP 4) in Buenos Aires will renew the momentum on implementing both the UN Framework Convention on Climate Change as well as the Kyoto Protocol. Emphasis should be placed on achieving the objectives of Kyoto by working towards an agreement on a work plan with timetables on the rules for the flexibility mechanisms, (emissions trading, the Clean Development Mechanism and Joint Implementation). The need for acknowledging the contributions to limiting greenhouse gases most countries have already made, on developing consensus on next steps and on avoiding unproductive arguments that lead to mistrust, was emphasized