computer chips

Electric Cars On The Rise | Earth Wise

May 16, 2022 By EarthWise Leave a Comment

The first quarter of the year was a tough one for the U.S. auto industry. Overall sales of cars and trucks were down 15.7% compared with last year. Automakers have been dealing with shortages of computer chips and other supplies, resulting in slowdowns in production.

The one major exception to the trend has been sales of electric cars. In the first quarter, U.S. electric vehicle sales were up 76% compared with last year. This was enough to double EV’s market share to 5.2%, up from 2.5% last year.

Reaching a five percent market share is a significant indicator that electric vehicles are becoming mainstream. According to many industry analysts, this is just the beginning of a major ramp-up in EV sales.

The strong results in the first quarter were largely driven by one company – namely, Tesla. Tesla has been expanding rapidly and has been proactive and creative in avoiding delays due to parts shortages. Tesla’s best-selling car is now the Model Y, which is an SUV implementation of its Model 3 design. Overall, the company is now producing cars at a rate of more than 1 million per year and has recently opened new manufacturing plants in Texas and in Germany.

But Tesla is not the only story in the world of electric vehicles. Mass production is beginning for Ford’s F-150 Lightning truck.

Nissan, Hyundai and Kia have electric cars on the market and shortly near-twin electric models jointly developed by Subaru and Toyota will be available as well.

The electrification of vehicles is an essential step in reducing greenhouse gas emissions. With gasoline at painfully high prices, electric cars are more attractive than ever.

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Inside Clean Energy: US Electric Vehicle Sales Soared in First Quarter, while Overall Auto Sales Slid

Photo, posted October 13, 2017, courtesy of Rob Bertholf via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio.

Sand From Mining Waste | Earth Wise

May 10, 2022 By EarthWise Leave a Comment

The natural resources people use the most are air and water. It may come as a surprise that in third place is sand. Sand is used to make glass, computer chips, toothpaste, cosmetics, food, wine, paper, paint, plastics, and more. It is estimated that 50 billion tons of sand are used each year.

Concrete is 10% cement, 15% water, and 75% sand. The concrete required to build a house takes on average 200 tons of sand, a hospital uses 3,000 tons, and a mile of a highway requires 15,000 tons.

One would think that there is no shortage of sand, but we are using it up faster than the planet can make it and the extraction of sand from seas, rivers, beaches, and quarries has negative impacts on the environment and surrounding communities. For example, removing sand leads to erosion in riverbanks, significantly increasing the risk of flooding in some places.

A potential strategy to reduce the impact of extracting sand to meet society’s growing need for is also a strategy for helping to reduce the production of mineral mining waste, which is the largest waste stream on the planet. Mining produces between 33 and 66 billion tons of waste material each year.

A new study by researchers in Switzerland and Australia looked at the potential for using mining waste as a source of so-called ore-sand. Sand-like material left over from mining operations could be used for many current applications for sand. Separating and repurposing these materials before they are added to the waste stream would not only reduce the volume of waste being generated by mining operations but would also create a responsible new source of sand.

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Solution to world’s largest waste stream: Make sand

Photo, posted October 22, 2005, courtesy of Alan via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio.

Computing With Honey | Earth Wise

April 28, 2022 By EarthWise Leave a Comment

Researchers are always working to develop faster and more powerful computers. Some of them believe that the future of computing lies with neuromorphic computers, which are systems designed to mimic the neurons and synapses found in the human brain.

The human brain has more than 100 billion neurons with more than 1 quadrillion synapses or connections among them. These numbers far exceed anything people have built. There have been some neuromorphic computer chips made that have the equivalent of more than 100 million neurons per chip, but this is still far less than the number in the brain. Despite all its complexity, the brain uses vastly less power than a powerful computer. Some supercomputers use tens of millions of watts to operate; the brain uses around 10 to 20 watts.

Many researchers are searching for biodegradable and renewable ways to make neuromorphic computing components. Researchers at Washington State University have demonstrated a way to make them using, of all things, honey. The honey is used to form a memristor, which is a component similar to a transistor that can both process and store data in memory. The device uses honey processed into a solid form and sandwiched between two metal electrodes. The organic device is very stable and reliable over a long time.

So far, these devices are on a micro scale – about the size of a human hair. The researchers want to develop them on a nanoscale, which is about 1/1000 the width of a human hair, and then bundle many millions or even billions together to make a neuromorphic computing system. Such a honey-based system would be renewable and biodegradable – which, pardon the pun, would be really sweet.

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Honey holds potential for making brain-like computer chips

Photo, posted January 28, 2008, courtesy of Dino Giordano via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio.