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Powerful storm systems that hit the U.S. Northeast starting July 9, 2023, dumped close to 10 inches of rain on New York’s Lower Hudson Valley in less than a day and sent mountain rivers spilling over their banks and into towns across Vermont. Vermont Gov. Phil Scott said he hadn’t seen rainfall like it since Hurricane Irene devastated the region in 2011. Extreme water disasters like this have disrupted lives in countries around the world in the past few years, from the Alps and Western Europe to Pakistan, India and Australia, along with several U.S. states in 2022 and 2023. The role of climate change is becoming increasingly evident in these types of deluges. Cars were stranded in floodwater on the campus of the United States Military Academy at West Point, N.Y., on July 10, 2023. U.S. Military Academy via AP Studies by scientists around the world show that the water cycle has been inte...

“Shark!” When you hear this word, especially at the beach, it can conjure up images of bloodthirsty monsters. This summer, my colleagues and I are eager to help the public learn more about these misunderstood, ecologically important and highly threatened animals and their close relatives – rays and chimaeras. As a marine biologist focused on conserving sharks, I want people to know that an estimated one-third of them are at risk of extinction. Second, there’s an amazing variety of species in an astounding variety of shapes sizes and colors, and many of them get very little attention. Here is an introduction to a group of fishes that are at extremely high risk of extinction, and also delightfully weird: the rhino rays, named for their elongated noses. Scientists tag endangered sawfish off Florida’s west coast to identify and protect their habitats and educate the public about them. Motley shapes Rhino rays a...

Back-to-school sales are underway, and people across the country will be shopping online to fill up backpacks, lockers and closets – and they’ll be taking advantage of free returns. Making it easy for customers to return items at no cost started as a retail strategy to entice more people to shop online. But it’s getting expensive, for both retailers and the planet. In 2022, retail returns added up to more than US$800 billion in lost sales. The transportation, labor, and logistics involved raised retailers’ costs even higher. Product returns also increase pollution, greenhouse gas emissions and waste in landfills, where many returned products now end up. So how can retailers fix this problem and still provide quality customer service? We conduct research in reverse logistics, focusing primarily on the intersection of retail returns and customer behavior. Here are some insights that can help reduce the abuse of free returns and lower costs without losing...

The world’s largest shipping companies are starting to update their fleets for a greener future. Maersk received the world’s first dual-fuel methanol container ship in July 2023, and dozens more container ships that can run on alternative fuels are currently on order. The industry – responsible for about 3% of global greenhouse gas emissions, more than Canada and Ireland combined – has reasons to act and to have some confidence in its multimillion-dollar investments. On July 7, the 175 member countries of the International Maritime Organization, a United Nations agency that regulates global shipping, agreed to a new climate strategy that includes reaching net-zero greenhouse gas emissions “by or around, i.e., close to, 2050.” The strategy’s language is vague, obscure and almost noncommittal. But it points the industry toward a cleaner future. New European Union rules will also soon go into effect that will significantly raise costs for...

When an explosion breached the Kakhovka Dam in Ukraine on June 6, 2023, much analysis focused on near-term impacts, including the flooding of the city of Kherson, threats to the Zaporizhzhia Nuclear Power Plant and consequences for Ukrainian military forces’ expected spring offensive against Russian troops. But the most severe long-term effects will fall on Southeast Ukraine’s farmers. Villages there were flooded. Roads, train tracks and irrigation canals were washed away. Crops in fields and orchards in the Kherson and Zaporizhzhia region were inundated, then left to shrivel after the water drained. The long-term ecological disaster will unfold over decades to come. Crimea, once a region known for its sunny beaches and rice fields, could dry up without irrigation. We are a U.S. political scientist with research expertise on the post-Soviet region and a Ukrainian economist who studies agriculture. While the long-term effects of the dam break are difficult to calcu...