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The United Nations food agency on Monday called for greater use of environmentally sustainable techniques by poor farmers in order to increase crop intensity to feed the world's growing population.

After recently undertaking a journey to walk -- not fly -- across the United States in the "Grounded" storyline and reconnect with the country and everyday Americans, Superman appears to be taking another step that could have major implications for his national identity: in Action Comics #900... ...Superman announces that he is going to give up his U.S. citizenship. Despite very literally being an alien immigrant, Superman has long been seen as a patriotic symbol of "truth, justice, and the American way," from his embrace of traditional American ideals to the iconic red and blue of his costume. What it means to stand for the "American way" is an increasingly complicated thing, however, both in the real world and in superhero comics, whose storylines have increasingly seemed to mirror current events and deal with moral and political complexities rather than simple black and white morality.

essays in this book reflect pioneering efforts to study the global movement of ideas and institutions. They deal with topics of significant contemporary importance: initiatives to address the AIDS epidemic in East Africa; to protect the peoples and ecosystems of the Amazon; to advance the "truth and reconciliation" process in South Africa and in other areas of great conflict; to promote "civil society" in Eastern Europe and Central Asia; to advocate for environmental protection in the United States, Great Britain, Germany, and Japan; and to spread Rotary Clubs and encourage "social entrepreneurship" throughout the world. These essays highlight a wide range of research, paying close attention to the realities of particular situations and to current thinking about general processes.

Signing a legally binding treaty that would force emissions reductions throughout the world is not likely in the near future, according to U.S. State Department Special Envoy for Climate Change Todd Stern, who visited MIT last week. But that shouldn't stop the United States from moving forward in addressing climate change issues, he said.

Along with China's rise as a world economic power have come a rapid climb in energy use and a related boost in man-made carbon dioxide emissions. In fact, China overtook the United States in 2007 as the world's leading emitter of greenhouse gases. Yet according to this new forecast, the steeply rising curve of energy demand in China will begin to moderate between 2030 and 2035 and flatten thereafter. There will come a time-within the next two decades-when the number of people in China acquiring cars, larger homes, and other accouterments of industrialized societies will peak. It's a phenomenon known as saturation. "Once nearly every household owns a refrigerator, a washing machine, air conditioners and other appliances, and once housing area per capita has stabilized, per household electricity growth will slow,'' Levine explains.

According to a report released by Freedom House titled Freedom on the Net 2011, Iran is the worst country when it comes to online freedom.  The top three countries, in order, are Estonia, The United States and Germany. The study judged countries based on three specific criteria: Obstacles to internet access, limits on content and violations of user rights.  They assigned each country a numerical score based on those criteria.  Countries scoring from 0-30 are designated "free," countries scoring from 31-60 are designated "party free" and those with score of 61-100 are labelled "not free."

The US president has urged Chinese leaders to implement policies to help create a more balanced economic relationship between Washington and Beijing. Barack Obama also raised concerns about the human rights situation in China in talks with Wang Qishan, the Chinese vice-premier, and the state councillor, Dai Bingguo, at the White House in Washington on Monday. Obama and the Chinese leaders discussed ways of working together to prevent Iran from developing nuclear weapons and to persuade North Korea to abandon its nuclear weapons programmes, the White House said in a statement.