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.

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.

The Sundarbans – a collection of densely populated islands in India’s sprawling Ganges Delta – are so remote that the only way to get there is by boat. But human traffickers still manage to get in, and that’s left many families with missing daughters.

Many have noted inequality as fuel for conflict. It can serve to exacerbate grievances amongst those who have less within unequal contexts, which can in turn serve as a mobilizing factor in fueling violence. Alternatively, it can make the “prize” of conflict larger – within the most unequal societies, the poor have less to lose and more to gain.

An advisory released this August by the U.S. National Weather Service warned this year’s El Niño could be among the strongest ever recorded, lasting well into the first few months of 2016.

As the world prepares for a pivotal climate conference in Paris this December, countries are offering their national plans to tackle a changing climate. These plans, known as intended nationally determined contributions (INDCs), contain details of what each country is prepared to do as part of a new global climate agreement. While the public focus is often on mitigation – how much countries are willing to reduce emissions, by when, and with what degree of transparency – adaptation to the impacts of climate change demands the same level of attention. In fact, the last round of international climate talks in Lima invited parties to include adaptation in their INDCs.

Start with the good news from this week’s finance for development conference in Addis Ababa: at least it got the narrative right.

As Saddam Hussein drained Iraq’s famed marshes to punish the rebellious tribesmen who lived in them, Amjad Mohamed packed his few possessions, grabbed his fishing rod, and fled south to Basra with his extended family.