New York City Mayor Bill de Blasio has called for “urgent, daring action” to help deliver on his pledge to reduce New York City’s greenhouse gas emissions by 80 percent by 2050. The Mayor asked us all to think about “the reckless way in which we live.”

The effects of climate change “are here now” and pose a “serious challenge” for the United States, said Alice Hill, White House senior advisor for preparedness and resilience, at the Wilson Center on July 29. [Video Below]

In 1986, global nuclear weapons stockpiles peaked at nearly 70,000 warheads. By the beginning of 2013, there were just over 17,000, with only 4,400 kept operational. This dramatic reduction was the fruit of a negotiation process that began in the late 1940s. In spite of incredible tensions between the United States and the Soviet Union, negotiators were able to make progress once they focused on building trust with small, pragmatic steps, rather than starting with the complete elimination of all weapons. [Video Below]

A new law in Peru encouraging investment in the country’s extractive industries has reignited debate on the lack of power indigenous women have in the mostly rural societies where they often live. The International Indigenous Women’s Forum, which drew more than 60 native women from across the world to Peru last month, highlighted this important issue.

“You can’t build a peaceful world on an empty stomach,” Secretary of State John Kerry said yesterday at a high-level working session on resilience and food security, quoting Norman Borlaug, the father of last century’s “Green Revolution.”

The time has come for us to collectively reexamine – and ultimately move past – the concept of sustainability. The continued invocation of sustainability in policy discussions ignores the emerging realities of the Anthropocene, which is creating a world characterized by extreme complexity, radical uncertainty, and unprecedented change. From a policy perspective, we must face the impossibility of even defining – let alone pursuing – a goal of “sustainability” in such a world. It’s not that sustainability is a bad idea. The question is whether the concept of sustainability is still useful as an environmental governance framework.

Many existing water-sharing treaties should be re-assessed in the context of climate change, write Shlomi Dinar, David Katz, Lucia De Stefano, and Brian Blakespoor in a World Bank working paper.

Since 2005, the Reducing Emissions from Deforestation and Forest Degradation program (REDD+) has functioned as a mechanism to financially incentivize the preservation of forestlands in order to reduce greenhouse gas emissions. But beyond its original use, some organizations have also started exploring ways it can help with other development initiatives, like women’s empowerment. [Video Below]