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This map reveals the cleanest vehicles based on location

Naysayers love to point out how dirty the electricity grid mix is when it comes to charging electric vehicles. Curmudgeons are eager to jump into any conversation about EVs to enlighten the lucky listeners about how plug-in cars contribute to pollution, sometimes even throwing in a dash of climate-change denial for good measure. (Thanks, buddy. Pray, tell me more about the plight of oppressed SUV owners.) Unless someone buys an EV just because they think they're cool (which, yeah, they often are), they probably have at least a passable understanding of their environmental pros and cons. As many EV owners are already aware, location has a lot to do with any particular plug-in car's carbon footprint. Still, there's always more to know, and knowledge is not a bad thing, especially if one uses it to do the right thing. That's why this handy-dandy map from Carnegie Mellon University is so interesting. CMU researchers have compiled information about the lifecycle greenhouse gas emissions of various EVs based on where they're charged, as compared to gasoline-powered vehicles. The researchers looked at the Nissan Leaf, Chevrolet Volt, and Prius Plug-In Hybrid versus the gasoline-dependent Toyota Prius hybrid and the stop-start-equipped Mazda3 with i-ELOOP and compared grams of CO2 emitted per mile. CMU takes into account the grid mix, ambient temperature, and driving patterns. CMU takes into account the grid mix based on county, as well as ambient temperature and driving patterns in terms of miles traveled on the highway or in the city. For instance, if you drive a Nissan Leaf in urban areas of California, Texas, or Florida, your carbon footprint is lower than it would be if you were driving a standard Toyota Prius. However, if you charge your Leaf in the Midwest or the South, for the most part, you've got a larger carbon footprint than the Prius. If you live in the rural Midwest, you'd probably even be better off driving a Mazda3. Throughout the country, the Chevrolet Volt has a larger carbon footprint than the Toyota Prius, but a smaller one than the Mazda3 in a lot of urban counties in the US. The Prius and Prius Plug-In are relatively equal across the US. Having trouble keeping it straight? That's not surprising. The comparisons between plug-in and gasoline vehicles are much more nuanced than the loudest voices usually let on.

Mazda has no plans for an RX-9, despite ongoing rotary development

We know Mazda is capable of making wonderful cars in any form or bodystyle. It also likes to tease enthusiasts with promising concepts like the stunning RX-Vision. In news that's sure to raise the ire of enthusiasts around the world, it seems the automaker has no plans to follow through with a production version of that beautiful, Soul Red coupe. In fact, it doesn't look like Mazda is interested in building any sports car that would slot above the Miata. In an interview with Automotive News, Mazda CEO Masamichi Kogai responded with a simple "No" when asked if Mazda has plans for a larger sports car entry. Kogai was asked if Mazda has any plans for a production rotary. He said that the 1.5- and 2.0-liter engines in the Miata are more exhilarating. That's a debatable and subjective argument that thousands of rotary owners both past and present would likely disagree with. It's more likely that despite ongoing development of the Wankel, Mazda is still struggling to meet emissions standards. Despite the advantages of a rotary (high power-to-weight ratio, compact size, rev-happy nature), it's not very fuel efficient and struggles with emissions testing. Also, despite the prestige and attention a halo sports coupe could potentially bring, Mazda is a small, independent automaker that needs to focus on mass appeal. Creating an all-new design with a unique engine isn't cheap. Badging a non-rotary car as an RX would be sacrilege, so don't expect an RX anything anytime in the near future. Current RX owners should take a moment to lament. Their car probably needs another quart of oil anyway. Related Video:

CES Part 2: Honda/Sony Afeela, BMW i Vision Dee and more | Autoblog Podcast #763

In this episode of the Autoblog Podcast, Editor-in-Chief Greg Migliore is joined by Senior Editor James Riswick and Associate Editor Byron Hurd. This week, they pick up from last week and dig deeper into some of the reveals and news coming from this year's Consumer Electronics Show (CES) including the Ram 1500 Revolution, the Afeela EV collaboration from Sony and Honda, Peugeot Inception, BMW i Vision Dee and VW ID.7, among other highlights and musings from the show. They also discuss the cars they've been driving, including the BMW iX, Mercedes EQS SUV, two-door Bronco Badlands, Mazda CX-50 Meridian Edition and Toyota RAV4 Wilderness Edition. Send us your questions for the Mailbag and Spend My Money at: Podcast@Autoblog.com. Autoblog Podcast #763 Get The Podcast Apple Podcasts – Subscribe to the Autoblog Podcast in iTunes Spotify – Subscribe to the Autoblog Podcast on Spotify RSS – Add the Autoblog Podcast feed to your RSS aggregator MP3 – Download the MP3 directly Rundown CES 2023 Ram 1500 Revolution Sony Honda Mobility Afeela EV prototype Peugeot Inception BMW i Vision Dee Volkswagen ID.7 Cars we're driving 2023 BMW iX 2023 Mercedes EQS 450 SUV 2022 Ford Bronco Badlands Two-Door 7MT 2023 Mazda CX-50 Meridian Edition 2023 Toyota RAV4 Woodland Edition Feedback Email – Podcast@Autoblog.com Review the show on Apple Podcasts Autoblog is now live on your smart speakers and voice assistants with the audio Autoblog Daily Digest. Say “Hey Google, play the news from Autoblog” or "Alexa, open Autoblog" to get your favorite car website in audio form every day. A narrator will take you through the biggest stories or break down one of our comprehensive test drives. Related video: Green Podcasts CES BMW Ford Honda Mazda Mercedes-Benz RAM Toyota Volkswagen Peugeot Truck Coupe Crossover SUV Concept Cars Electric Luxury Off-Road Vehicles Performance Sedan Afeela