【中国为世界农业科技发展提供重要借鉴】Fusuo Zhang Xinping Chen & Peter Vitousek.Chinese agriculture: An experiment for the world. Nature 497 33–35 (02 May 2013) doi:10.1038-497033a

China's scientists are using a variety of approaches to boost crop yields and limit environmental damage say Fusuo Zhang Xinping Chen and Peter Vitousek.

【大气二氧化碳日浓度将超过400ppm】Richard Monastersky. Global carbon dioxide levels near worrisome milestone. Nature 497 13–14 (02 May 2013) doi:10.1038-497013a

Near the moonscape summit of the Mauna Loa volcano in Hawaii an infrared analyser will soon make history. Sometime in the next month it is expected to record a daily concentration of carbon dioxide in the atmosphere of more than 400 parts per million (p.p.m.) a value not reached at this key surveillance point for a few million years.

There will be no balloons or noisemakers to celebrate the event. Researchers who monitor greenhouse gases will regard it more as a disturbing marker of humanity’s power to alter the chemistry of the atmosphere and by extension the climate of the planet. At 400 p.p.m. nations will have a difficult time keeping global warming in check says Corinne Le Quéré a climate researcher at the University of East Anglia in Norwich UK who says that the impact “is getting very dangerously close to reaching the 2 °C target that governments around the world have pledged not to exceed”....

（参考阅读《全球二氧化碳水平下月或“糟糕”透顶》）