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Domain: grist.org
Stories and comments across the archive that link to grist.org.
Stories · 6
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Planting GMOs Kills So Many Bugs That It Helps Non-GMO Crops (arstechnica.com)
An anonymous reader quotes a report from Ars Technica: One of the great purported boons of GMOs is that they allow farmers to use fewer pesticides, some of which are known to be harmful to humans or other species. Bt corn, cotton, and soybeans have been engineered to express insect-killing proteins from the bacterium Bacillus thuringiensis, and they have indeed been successful at controlling the crops' respective pests. They even protect the non-Bt versions of the same crop that must be planted in adjacent fields to help limit the evolution of Bt resistance. But new work shows that Bt corn also controls pests in other types of crops planted nearby, specifically vegetables. In doing so, it cuts down on the use of pesticides on these crops, as well.
Entomologists and ecologists compared crop damage and insecticide use in four agricultural mid-Atlantic states: New Jersey, Delaware, Maryland, and Virginia. Their data came from the years before Bt corn was widespread (1976-1996) and continued after it was adopted (1996-2016). They also looked at the levels of the pests themselves: two different species of moths, commonly known as the European corn borer and corn earworm. They were named as scourges of corn, but their larvae eat a number of different crops, including peppers and green beans. After Bt corn was planted in 1996, the number of moths captured for analysis every night in vegetable fields dropped by 75 percent. The drop was a function of the percentage of Bt corn planted in the area and occurred even though moth populations usually go up with temperature. So the Bt corn more than counteracted the effect of the rising temperatures we've experienced over the quarter century covered by the study. -
'Bitcoin Could Cost Us Our Clean-Energy Future' (grist.org)
An anonymous reader shares an article: Bitcoin wasn't intended to be an investment instrument. Its creators envisioned it as a replacement for money itself -- a decentralized, secure, anonymous method for transferring value between people. But what they might not have accounted for is how much of an energy suck the computer network behind bitcoin could one day become. Simply put, bitcoin is slowing the effort to achieve a rapid transition away from fossil fuels. What's more, this is just the beginning. Given its rapidly growing climate footprint, bitcoin is a malignant development, and it's getting worse. Digital financial transactions come with a real-world price: The tremendous growth of cryptocurrencies has created an exponential demand for computing power. As bitcoin grows, the math problems computers must solve to make more bitcoin (a process called "mining") get more and more difficult -- a wrinkle designed to control the currency's supply. Today, each bitcoin transaction requires the same amount of energy used to power nine homes in the U.S. for one day. And miners are constantly installing more and faster computers. Already, the aggregate computing power of the bitcoin network is nearly 100,000 times larger than the world's 500 fastest supercomputers combined. The total energy use of this web of hardware is huge -- an estimated 31 terawatt-hours per year. More than 150 individual countries in the world consume less energy annually. And that power-hungry network is currently increasing its energy use every day by about 450 gigawatt-hours, roughly the same amount of electricity the entire country of Haiti uses in a year. -
Injured Bald Eagle Gets New 3-D Printed Beak
An anonymous reader writes "A bald eagle that lost its beak to a poacher's gun receives a 3-D printed beak prosthetic like a dental implant." More (with pictures): "Mr Calvin, a founder of the Boise-based Kinetic Engineering Group, made a mold of Beauty's shattered upper mandible, laser-scanned it, fine-tuned it in a 3D modeling program, and created a prosthetic beak from a nylon-based polymer." -
Museum of Engineered Organisms Opens In Pittsburgh
qeorqe writes "The Center for PostNatural History is a museum and research library about organisms that have been created either by genetic engineering or selective breeding. Included in the collection are Sea Monkeys and GloFish. From the article: 'One of the cool things about natural history museums is that they show you how nature has changed over time, adapting to volatile conditions and extreme challenges. And nothing is more volatile, extreme, or challenging than the human race, so it makes sense that there would be a museum to chronicle just how much we’ve messed with plants, animals, the climate, and in general the world around us. The Center for PostNatural History, opening this week in Pittsburgh, is that museum.'" -
FDA Sued To Stop Antibiotic Abuse On Factory Farms
Hugh Pickens writes writes "Medical groups from the American Medical Association to the American Society of Microbiology have appealed to the government and industry for years to restrict the practice of providing sub-therapeutic doses of antibiotics for livestock, lest critical antibiotics become useless for human treatments. Now Tom Laskawy reports that a coalition of environmental groups has decided to sue the Federal Drug Administration to follow its own safety findings and withdraw approval for most non-therapeutic uses of penicillin and tetracyclines in animal feed to healthy livestock when it's not medically necessary. 'While this may cause eyerolls among some who look at this as "just another lawsuit," there's something very important going on with the courts and contested science right now,' writes Laskawy. 'As it happens, one of the main roles of a judge is as "finder of fact." In practice, this means that judges determine whether scientific evidence is compelling enough to force government action."'" -
Lichtblick and Volkswagen To Build 'Swarm' Power Plants
Dr. Hok writes "As more and more renewable energy enters the grid, it gets increasingly difficult to match supply and demand 24/7. The answer of German power company Lichtblick and Volkswagen is a swarm of 100,000 flexible base-load generators. These fridge-sized CHP (Combined Heat and Power) generators that will be installed in people's basements in Hamburg starting early next year will feed electricity into the grid and the waste heat into their home's water/heating. The "ZuhauseKraftwerk" (HomePowerPlant) features a vanilla VW Golf natural-gas engine that generates 20kW electrical and 34 kW heat with an efficiency of 92%. The units are remotely controlled via a mobile network or DSL; they can ramp up in a minute if needed. A water tank ensures that heat is continuously available, while electricity is produced on demand. The swarm will replace two nuclear plants, they say. And your old oil heating needed replacement anyway."