u.n. secretary-general ban ki-moon says climate change poses a "clear and urgent" challenge the international community must address. negotiators from nearly 200 countries, including the united states, will meet in doha, qatar, for a u.n. climate change summit later this month, november 26 to december 7.
the first decade of this century was the hottest on record, and the vast majority of scientists attribute the changes to greenhouse gases that trap heat in the lower atmosphere.
资源难易程度:★★★★★★★★★★★★★★★
高考资源网版权所有 ©2005-2014
未经许可，盗用或转载本站资料者，本站将追究其法律责任！
