求翻译：　　自1992年在巴西里约热内卢通过《联合国气候变化框架公约》以来，人类为全面控制二氧化碳等温室气体排放，应对全球气候变暖给人类经济和社会带来不利影响付出了诸多努力。然而规定温室气体减排成为发达国家法律义务的《京都议定书》第一承诺期2012年底即将到期，后继的第二承诺期却由于发达国家和发展中国家之间尖锐的矛盾迟迟不能达成协议，20年来气候变化谈判的整个框架面临严重威胁。是什么意思？

Since 1992 in Rio de Janeiro, Brazil, through the United Nations Framework Convention on Climate, human paid a lot of effort for full control of carbon dioxide and other greenhouse gas emissions to combat global warming adversely affect human economic and social. However, the provisions of the legal

Since 1992, in Rio de Janeiro, Brazil by the United Nations Framework Convention on Climate Change, human beings for the overall control 2 greenhouse gases such as carbon dioxide emissions and global warming should be addressed to human economic and social had a negative impact has been a great deal

　　In 1992 in Brazil Rio de Janeiro since the adoption of the United Nations Framework Convention on climate change, human comprehensive control of carbon dioxide and other greenhouse gas emissions, global warming to humans pay adversely affecting economic and social efforts. However provisions becom