In May 2011, two weeks before I was scheduled to start research in the region, a Mongol herder named Mergen was hit by a mining truck while protecting his pastureland in Xilingol, Inner Mongolia. He was dragged 140 feet and killed. His death sparked a month of protests.

The announcement in Washington on September 24 that President Xi Jinping is committing China to a national carbon trading system is the latest step in an important partnership between the two biggest carbon emitters in the world.

United States President Barack Obama invested four years and his top diplomats in containing Iran’s nuclear capabilities. He did this because an armed Iran is an existential threat to its neighbors, its region, and the world. Obama’s efforts in the talks stand in marked contrast to those geared toward addressing an even bigger and longer-term existential threat – containing climate change. The conditions that allow humans to survive, evolve, and thrive on earth are being compromised; radical changes in the climate promise a very uncertain future.

Scenario planning has a long history – the RAND Corporation employed it heavily in planning for potential U.S. responses to nuclear war and 16^th century Spanish Jesuit theologians pointed to the idea as proof of free will – but in many respects this powerful set of methodological tools for managing complexity and uncertainty remains underused, especially beyond the defense, intelligence, and business communities.

As Pope Francis gets into high gear on his visit to the United States, it’s worth reviewing details and contexts in the extraordinary message to Catholics and the rest of the planet in “On Care for Our Common Home,” the encyclical he issued earlier this year.

According to recent polling, climate change is seen as the single most threatening international challenge around the world, and there’s evidence that all that worry is taking a psychological toll. Adding to droughts, floods, extreme weather, and die-offs, psychologists are observing higher levels of anxiety, depression, and post-traumatic stress disorder in certain areas and professions. Even people who do not actively stress about global warming or view it as a major threat may still suffer psychological trauma from its effects.

Isabel dos Santos, the daughter of Angolan President José Eduardo dos Santos and the richest woman in Africa, owes her wealth to the oil industry. Delfina Fernandes, a woman living in abject poverty in the village of Kibanga, uses gasoline as an anesthetic to dull the sheering pain of her rotting teeth.