TheConversation

The Russia-Ukraine grain deal that has been critical to keeping global food prices stable and preventing famine is currently in tatters. On July 17, 2023, Russia said it was pulling out of the year-old deal, which allowed shipments of grains and other foodstuffs to travel past the Russian naval blockade in the Black Sea. And to make matters worse, over the next two days Russia bombed the Ukrainian grain port of Odesa, destroying over 60,000 tons of grain. As a result, food prices have surged, with the cost of wheat, corn and soybeans in Europe, the Middle East and elsewhere all skyrocketing. So, what is the grain deal, and why is it so important to the global food supply chain? Anna Nagurney is an expert on supply chains, including those involving perishable products like food, and is co-chair of the board of directors overseeing the Kyiv School of Economics in Ukraine. She explains how important Ukrainian grain is to feeding the world – and why the Black Sea is a vita...

The Klamath River runs over 250 miles (400 kilometers) from southern Oregon to the Pacific Ocean in Northern California. It flows through the steep, rugged Klamath Mountains, past slopes of redwood, fir, tanoak and madrone, and along pebbled beaches where willows shade the river’s edge. Closer to its mouth at Requa, the trees rising above the river are often blanketed in fog. The Klamath is central to the worldviews, history and identity of several Native nations. From headwaters in Klamath, Modoc and Yahooskin-Paiute lands, it flows through Shasta, Karuk, Hupa and Yurok homelands. The Yurok Tribe has legally recognized the personhood of the river. Historically, the Klamath was the third-largest Pacific salmon-producing river on the West Coast. The river supported abundant and diverse runs of native fish, including Chinook and coho salmon, steelhead trout, Pacific lamprey, green sturgeon, eulachon smelt and coastal cutthroat trout. Most of the Klamath in California has...

Extreme heat has been breaking records across Europe, Asia and North America, with millions of people sweltering in heat and humidity well above “normal” for days on end. Death Valley hit a temperature of 128 degrees Fahrenheit (53.3 degrees Celsius) on July 16, 2023 – not quite the world’s hottest day on record, but close. Phoenix broke a record heat streak with 19 straight days with temperatures above 110 F (43.3 C), and had more in the forecast, accompanied by several nights that never got below 90 F (32.2 C). Globally, Earth likely had its hottest week on modern record in early July. Heat waves are becoming supercharged as the climate changes – lasting longer, becoming more frequent and getting just plain hotter. One question a lot of people are asking is: “When will it get too hot for normal daily activity as we know it, even for young, healthy adults?” The answer goes beyond the temperature you see on the thermometer. It’s...

In the U.S., most consumers take clean and available fresh water for granted, and water usually becomes front-page news only when there’s a crisis. And the past year has seen its share of water-related crises, whether it’s the effects of a prolonged drought in the U.S. Southwest or floods that covered more than one third of Pakistan last year. But seeing water problems as only environmental disasters does not capture the deeply interconnected nature of water in our society. To mark the release of the book “The Conversation on Water,” a collection of previously published articles on water, The Conversation hosted a webinar with experts with a range of expertise and different perspectives on water issues and potential solutions. The edited text and video clips below convey one or two of the key points each speaker made. The full webinar is available on YouTube. Indigenous scholar Rosalyn LaPier explains Native Americans’ e...

As rising global temperatures make extreme storms more common, the nation’s dams and reservoirs – crucial to keeping communities dry – are being tested. Storms in the U.S. Northeast stretched the region’s flood control systems nearly to the breaking point in July 2023. California and states along the Mississippi River faced similar flood control challenges in 2023. Managing these flood control systems is a careful balancing act. Do managers release water to make room for the storm’s runoff, increasing the risk of flooding downstream, or hold as much as possible to protect downstream farms and communities, which could increase the chance of larger floods if another storm comes through? The earlier decisions can be made, the better the chance of avoiding downstream damage. But forecasts aren’t always reliable, and waiting for the rain to fall may mean acting too late. Satellite water vapor imagery from July 9-11, 20...