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In a Zen parable, a man sees a horse and rider galloping by. The man asks the rider where he’s going, and the rider responds, “I don’t know. Ask the horse!” It is easy to feel out of control and helpless in the face of the many problems Americans are now experiencing – unaffordable health care, poverty and climate change, to name a few. These problems are made harder by the ways in which people, including elected representatives, often talk past each other. Most people want a strong economy, social well-being and a healthy environment. These goals are interdependent: A strong economy isn’t possible without a society peaceful enough to support investment and well-functioning markets, or without water and air clean enough to support life and productivity. This understanding – that economic, social and environmental well-being are intertwined – is the premise of sustainable development. In 2015, the United Nations General Assembly u...

Invasive species – including plants, animals and fish – cause heavy damage to crops, wildlife and human health worldwide. Some prey on native species; other out-compete them for space and food or spread disease. A new United Nations report estimates the losses generated by invasives at more than US$423 billion yearly and shows that these damages have at least quadrupled in every decade since 1970. Humans regularly move animals, plants and other living species from their home areas to new locations, either accidentally or on purpose. For example, they may import plants from faraway locations to raise as crops or bring in a nonnative animal to prey on a local pest. Other invasives hitch rides in cargo or ships’ ballast water. When a species that is not native to a particular area becomes established there, reproducing quickly and causing harm, it has become invasive. These recent articles from The Conversation describe how several invasive species are causing eco...

Forecasters expected Hurricane Idalia to intensify into a major hurricane as it headed over exceptionally warm waters in the Gulf of Mexico, on track for landfall in Florida on Wednesday, Aug. 30, 2023. Hurricane warnings were posted along a wide stretch of Florida’s Gulf coast, from near Sarasota to the Panhandle, including Tampa Bay. Hurricane scientist Haiyan Jiang of Florida International University explains how two conflicting forces – record-high ocean heat and wind shear, the latter influenced by El Niño – were determining Idalia’s future, and how they have made the 2023 hurricane season overall difficult to forecast. What role is ocean temperature playing in Idalia’s forecast? Forecasters are watching several factors, but the biggest is the very high sea surface temperature in the Gulf of Mexico. The Gulf is typically warm in late August, and we often see hurricanes this time of year. But this summer, the sea surface temperature has...

Not only people need to stay cool, especially in a summer of record-breaking heat waves. Many machines, including cellphones, data centers, cars and airplanes, become less efficient and degrade more quickly in extreme heat. Machines generate their own heat, too, which can make hot temperatures around them even hotter. We are engineering researchers who study how machines manage heat and ways to effectively recover and reuse heat that is otherwise wasted. There are several ways extreme heat affects machines. No machine is perfectly efficient – all machines face some internal friction during operation. This friction causes machines to dissipate some heat, so the hotter it is outside, the hotter the machine will be. Cellphones and similar devices with lithium ion batteries stop working as well when operating in climates above 95 degrees Farenheit (35 degrees Celsius) – this is to avoid overheating and increased stress on the electronics. Cooling designs that use inn...

The 2022 Inflation Reduction Act, President Joe Biden’s landmark climate law, is now expected to prompt a trillion dollars in government spending to fight climate change and trillions more in private investment. But the law and Biden’s broader “buy American” agenda include measures that discriminate against imports. One year in, these policies, such as the law’s electric vehicle subsidies, appear to be succeeding at growing domestic clean energy industries – consider the US$100 billion in newly announced battery supply chain investments. But we believe the law also clearly violates international trade rules. The problem is not the crime but the cover-up. Today’s trade rules are ill-suited for the climate crisis. However, simply tearing them down could hinder economic growth and climate progress alike. If U.S. leaders instead take responsibility for forging an improved international trade system – rather than denying the violation...