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Solar Geoengineering May Alleviate Impacts of Global Warming on Crops
Solar geoengineering — putting aerosols into the atmosphere to reflect sunlight and reduce global warming — is not a fix-all for climate change but it could be one of several tools to manage climate risks. A growing body of research has explored the ability of solar geoengineering to reduce physical climate changes. But much less is known about how solar geoengineering could affect the ecosystem and, particularly, agriculture.
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Engineers and Economists Prize Efficiency, but Nature Favors Resilience – Lessons from Texas, COVID-19 and the 737 Max
The damage from Winter Storm Uri, the economic devastation from the COVID-19 pandemic and the fatal Boeing 737 Max accidents show the price society pays for a relentless pursuit of efficiency. Modern society has prioritized free-market economics and efficient computer systems to the detriment of other priorities. Studies of algorithms show that efficiency can come at a high cost. Sexual reproduction and car insurance highlight the benefits of resilience.
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How Do We Know Whether an Asteroid Headed Our Way Is Dangerous?
There are a lot of things that pose a threat to our planet – climate change, natural disasters, and solar flares, for example. But one threat in particular often captures public imagination, finding itself popularized in books and films and regularly generating alarming headlines: asteroids.
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Aging Dams Pose Growing Threat
By 2050, most people on Earth will live downstream of tens of thousands of large dams built in the twentieth century, many of them already operating at or beyond their design life. Increasingly expensive to maintain, experts foresee a trend to decommissioning dams.
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This Beetle Survives Getting Run Over by a Car: Engineers Are Figuring Out How
Getting run over by a car is not a near-death experience for the diabolical ironclad beetle. How the beetle survives could inspire the development of new materials with the same herculean toughness, engineers show in a just-published paper.
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Top Reasons for Sewer Line Failure
Concrete sewer pipes around the world are most likely to fail either because their concrete is not strong enough or because they can’t handle the weight of trucks that drive over them, a new study indicates.
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Venice Ambitious Anti-Flood System Passes First Trial
Venice On Friday conducted the first test of a controversial dam system made up of 78 inflatable barriers, aiming to protect the city from severe flooding. The ambitious and costly dam system, launched in 2003, has been plagued by corruption and is nearly a decade behind schedule. It will becoe fully operational by the end of 20201, and it is designed to hold water surges as high as 10 feet.
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Reverse Engineering of 3D-Printed Parts by Machine Learning Reveals Security Vulnerabilities
Over the past thirty years, the use of glass- and carbon- fiber reinforced composites in aerospace and other high-performance applications has soared along with the broad industrial adoption of composite materials. Machine learning can make reverse engineering of complex composite material parts easy.
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Do Two Failed Dams Foretell a Dire Future?
Climate change is increasing the frequency of extreme rainfall events and hence the risk for filling and overtopping dams, which is the predominant mechanism of dam failure. However, using climate change as a bogeyman for aging infrastructure failure is an unfortunate trend, since it takes attention away from an urgent and potentially fixable problem.
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Rising Tide: Seeking Solutions to S.C.’s Mounting Nuisance Floods
While a rising tide may lift all boats, it spells trouble for South Carolina coastal communities where flooding has already long been a fact of life. Low-lying areas such as the state’s more than 2,000 miles of coastline are increasingly prone to floods and storm surge as sea levels rise — driven by a more variable global climate system. Researchers are examining green solutions to help those communities fight back.
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A Dam Across the North Sea to Protect Europeans from Sea-Level Rise
Engineers say that a 475-km-long dam between the north of Scotland and the west of Norway. and another one of 160 km between the west point of France and the southwest of England, could protect more than 25 million Europeans against the consequences of an expected sea level rise.
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Building Standards Give Us False Hope. There's No Such Thing as a Fireproof House
Bushfires have killed 33 people and destroyed nearly 3,000 houses across Australia so far this fire season. Canberra is under threat right now. It isn’t only houses. Significant commercial buildings have been destroyed, among them Kangaroo Island’s iconic Southern Ocean Lodge. In New South Wales alone, 140 schools have been hit. Many require extensive work. Trouble is, Australia’s National Construction Code provides false, and dangerous, hope. The sad truth is that any practical building that is exposed to an intense bushfire will probably burn down, whether it complies with Australia’s National Construction Code or not.
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Sea-Level Rise Could Trigger Migration from Coastal Areas to Inland Cities in U.S.
When Hurricane Harvey slammed into the Texas coast in 2017, displaced residents flocked inland, trying to rebuild their lives in the disaster’s aftermath. Within decades, the same thing could happen at a much larger scale due to rising sea levels, says a new study. The researchers say that climate change-driven sea-level rise could trigger mass migration of Americans to inland cities.
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Climate Change Means the U.S. Must Start Building Big Things Again
There used to be a time when the United States was adept at planning and building big projects – the highway system, putting a man on the moon, and more. Not anymore, James Temple writes. He notes that nearly every giant infrastructure project in the United States suffers from massive delays and cost overruns, and this is when they are not shut down altogether before completion. “The U.S. has become terrible at building big things, and negligent in even maintaining our existing infrastructure,” he writes, adding: “That all bodes terribly for our ability to grapple with the coming dangers of climate change, because it is fundamentally an infrastructure problem.”
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The Earth Needs Multiple Methods for Removing CO2 from the Air to Avert Worst of Climate Change
Concentrations of carbon dioxide in the atmosphere are higher than at any time in human history, and nine of the warmest years have occurred since 2005. “Avoiding catastrophic impacts on our coastal infrastructure, biodiversity, food, energy and water resources will require more. In particular, many climate researchers like myself believe government needs to advance technology that will actually suck carbon dioxide out of the air and put it away for very long periods,” David Goldberg writes.
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