Barren barley and wheat fields stretch across the dry landscape of northern Afghanistan, the result of persistent drought and flash flooding that has left thousands of people facing food shortages and loss of work.

From earthquakes to floods, when natural disasters strike, the military is often called on to bolster civilian responses. Policymakers throughout Latin America in particular are increasingly relying on the armed forces for emergency assistance.

There’s perhaps no better evidence of China’s growing appetite for American agricultural products than the ongoing transformation of the port of Oakland.

Camels pulling wooden carts loaded with coconuts plod down the main road amid speeding motorcycles, buses, rickshaws, and cars. Farmers sit atop slow-moving oxcarts loaded with grasses and other cattle feed. In this region of central Gujarat, India, it appears that rural life has not changed for decades.

When you shop for a new refrigerator or pair of shoes, where do you look for information about products? Do you log onto Amazon and read reviews? Check Consumer Reports for lab-verified results? Consult your neighbor or mom?

Global climate trends indicate that our planet will continue warming into the next century, leading to more extreme climate conditions. The Latin America and Caribbean region is vulnerable to some of the most challenging aspects of climate change – sea-level rise, changes in precipitation, glacial melting, spreading of disease, and extreme weather events.

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.

For all its flaws, the United Nations remains the only plausible forum for engaging broad global challenges like sustainable development. The most important environmental achievements of the past 40 years – the rise of environmental awareness, the birth of key ideas such as sustainability or the common heritage of humanity and the most important global treaties for environmental protection – all bear the UN stamp in one way or another. We could have added environmental human rights to that legacy last month, but we failed.