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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.

VW sales increase 0.6% in September despite diesel scandal

Volkswagen was spared in the month of September from posting a sales disaster, but in reality, the impending doom and gloom is likely just postponed until October. According to VW, it delivered 26,141 vehicles to its dealerships last month, which represents a 0.6-percent gain over the same period a year ago. While up, that meager increase represents the smallest uptick of all major brands in the United States, which is currently in the middle of the best vehicular sales year in the last decade. Audi, the German automaker's mainstream luxury unit, saw a bigger gain at 16.2 percent with 17,340 total units sold, thanks in large part to the popularity of its crossover models. These numbers can't totally be taken at face value, however. In 2014, Labor Day weekend was counted as part of August's sales figures; in 2015, that traditional car-buying holiday fell early in September and is therefore partly responsible for the huge increases from all brands doing business in the United States. Remember, the diesel emissions scandal didn't hit the news until September 18, which means VW was free to sell its 2.0-liter TDI engine for the majority of the month. In other words, October is going to be the real indicator of sales reckoning as it will be the first full month that the brand can't sell its popular diesel models and the first since its emissions scandal broke. Still, TDI sales were down last month. VW reports a total of 3,060 sales of vehicles equipped with TDI engines, which represents 11.7 percent of total volume. That's nearly cut in half from the TDI's year-to-date volume percentage of 20.4 percent. "We would like to thank dealers and customers for the support of the Volkswagen brand," said Mark McNabb, chief operating officer for Volkswagen of America in a statement. "Volkswagen will continue to work diligently to regain trust and confidence in our brand." It's not yet clear exactly when VW will issue a fix to make its 2.0-liter TDI engine emissions legal, or when the EPA will recertify those models for sale. Once those two things happen, dealers will again be free to sell vehicles equipped with the powertrain, but even then it remains to be seen how consumers react when the sales ban is lifted. Scroll down below for all the sales data from Volkswagen in September.

A dealer made a 'Urus' out of an Audi Q7 to get people excited for Lambo's SUV

Fake news seems to be catching on. In an attempt to drum up some interest in the upcoming Lamborghini Urus (the Italian SUV that hasn't been unveiled yet) the Lamborghini dealer in Nurnberg, Germany, created a Lambo-badged promotional vehicle. It seems it has fooled at least a few folks, with several outlets reporting on it as if it's a Lamborghini prototype. Of course, it's not. What you're looking at is an Audi Q7 with a camouflage wrap that includes a Lamborghini-script logo across the back and a promotional message on the side, which reads: "Der Urus kommt / Lamborghini Nurnberg." Thanks to one semester of German, we can tell you that first part means "The Urus is coming." Note, that's "is coming," not "is here." There's also something that kind of resembles a scoop on the front fender. It's also fake. It's not uncommon for automakers to put a cryptic message on the side of a test car, often with swirly camo, but this takes the idea a step further since it's not the actual car underneath. That said, the production Urus, whenever it arrives, is expected to share the Audi Q7's MLB 2 platform. So it sort of works. Kind of. Related Video: Image Credit: CarPix Audi Lamborghini Crossover SUV Luxury Performance confirmed