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Recharge Wrap-up: Ferrock a carbon-negative cement substitute, Audi makes e-diesel

A cement alternative uses recycled materials and traps CO2 rather than producing it. Invented by David Stone at the University of Arizona, Ferrock uses recycled steel dust and glass to produce a substance stronger than conventional concrete. Cement has a high carbon footprint from the high heat needed to process the limestone. Ferrock needs no such heat, and it actually uses CO2 to harden, making it, as Stone calls it, a carbon-negative material. Learn more in the video above, see the transcript at PBS NewsHour and read more at Green Car Reports. Teslarati offers a detailed rundown of Tesla's new Valet Mode feature for the Model S. Part of the Firmware 6.2 update, Valet Mode allows the owner to disable certain performance features and block personal information when letting someone else drive the car. It limits the car's to speed to 70 miles per hour, and caps output at 80 kW. It can also disable mobile app access, Homelink, Bluetooth and wifi and the "Places" function, which stores addresses for you. The folks at Teslarati did find some shortcomings in the new feature, though. Read more at Teslarati. Audi has produced its first batch of e-diesel made from water and CO2. The fuel is made by reacting hydrogen from the water with CO2 to make long-chain hydrocarbon compounds called "blue crude." That can then be refined similarly to crude oil to make e-diesel, which is a fuel free from sulfur and aromatic hydrocarbons. That e-diesel can be used on its own, or mixed with fossil fuel diesel to power a vehicle. "In developing Audi e-diesel we are promoting another fuel based on CO2 that will allow long-distance mobility with virtually no impact on the climate," says Audi Head of Sustainable Product Development Reiner Mangold. Read more in the press release below. Fuel of the future: Research facility in Dresden produces first batch of Audi e-diesel - The verdict: Pilot plant produces high-quality diesel fuel - No need for mineral oil: e-diesel made from water, CO2 and green power - Minister Wanka: "Synthetic diesel using CO2 is a huge success" Audi has taken another big step in the development of new, CO2 neutral fuels: A pilot plant in Dresden has started production of the synthetic fuel Audi e diesel. After a commissioning phase of just four months, the research facility in Dresden started producing its first batches of high-quality diesel fuel a few days ago. To demonstrate its suitability for everyday use, Federal Minister of Education and Research Prof.

The Volkswagen Group switches official language to English

The Volkswagen Group can't be fairly thought of as entirely German anymore, so the news that the company is switching its official language to English to help attract managers and executives is a rational, if surprising, decision. While many VW Group companies are still staidly German in character and culture, consider the other companies that it controls: Bentley (British), Bugatti (French), Ducati and Lamborghini (Italian), Skoda (Czech), Scania trucks (Swedish), and SEAT (Spanish). Not to mention the large Volkswagen Group of America operation, which constructs cars in Chattanooga, TN. Volkswagen's explicit motivation is to improve management recruitment – making sure the company isn't losing out on candidates for important positions because they can't speak German – and that's inherently sensible in a globalized economy. Particularly considering, like it or lump it, that English is the lingua franca of said global economy. It also should make it inherently easier to communicate between its world-wide subsidiaries and coordinate operations. It's hard to say for sure if this will have any impact on the consumer, although it's easy to see the benefits if, say, VW Group hires some American product planners or engineers and they push for features and designs that more closely suit American needs. After all, the US is a hugely important market for any manufacturer, and so the switch to English almost certainly has something to do with the outsized influence of the US in the global economy. And there doesn't seem to be a downside from a purely rational perspective, although it could mean that the Group's corporate culture becomes less German. Whether that's a good or a bad thing depends on your perspective. Related Video: Image Credit: Krisztian Bocsi/Bloomberg via Getty Images Plants/Manufacturing Audi Bentley Bugatti Porsche Volkswagen SEAT Skoda

Next-gen Audi R8 E-Tron could have 280-mile range

Will the next hypermiling contest take place between the latest iteration of the Audi R8 E-Tron and a Tesla Model S. On paper, the single-charge range between the high- and higher-end EVs are nearly identical, so it's possible. But what fun would that be, using light pedal foot and all? Audi has released the latest specs for the R8 E-Tron, and they are just beastly. The EV will deliver 456 horsepower, have 679 pound-feet of torque and will be able to jet from 0 to 60 miles per hour in less than four seconds. More stunningly, the car will have a single-charge range of 280 miles, which is about 15 miles longer than the Model S's range. Audi says the new, long-distance pack is due to " new battery cells," but declined to go into detail. Despite the excellent numbers, not everyone thinks a new R8 E-Tron poses any threat to Tesla. Prices for the "base" version of the R8 with a gas-powered V10 engine start at 165,000 euros ($185,000), and there's no guessing yet what an EV version will cost. Whatever it is, the car's been markedly improved compared to the earlier iterations. We reported on progress of the new R8 E-Tron about a year ago that the single-charge range would climb to about 250 miles, and that the mill would deliver about 376 horsepower. Audi first showed off a concept version of the car at 2009's Frankfurt Auto Show, saying at the time that the model had a single-charge range of about 150 miles. So this is good progress. Check out Audi's rather lengthy press release below. Audi presents the new R8: The sporty spearhead just got even sharper The second generation of the high-performance sports car makes its debut in Geneva 5.2 FSI engine with up to 449 kW (610 hp), 0 to 100 km/h (62.1 mph) in 3.2 seconds New multimaterial Audi Space Frame with high proportions of aluminum and CFRP No model with the four rings is closer to motorsport, none is more striking and more dynamic: at the Geneva Motor Show, Audi is presenting the second generation of its high-performance R8 sports car. The V10 mid-engine and a newly developed quattro drive ensure breathtaking driving performance, especially in the top-of-the-range version with 449 kW (610 hp): achieving 0 to 100 km/h (62.1 mph) in just 3.2 seconds, its top speed is 330 km/h (205.1 mph).