In the first two parts of our discussion, Tesla Motors Chairman Elon Musk described how he came to be a part of Tesla Motors and how he influenced the development of the Roadster. It's important to note that he never described himself as the designer or creator of the Roadster. Rather he considers himself the co-architect of the sports car.

With production of the Roadster now sort of underway and the updated drivetrain hopefully coming soon, it's time to look forward. As the self-declared Product Architect, Musk is playing perhaps an even bigger role with the next product, a sedan that we've known for some time by the code name WhiteStar. We had hoped to see WhiteStar this spring but that obviously hasn't happened yet. In the conclusion of our discussion, Musk gives out some hints about what to expect and what Tesla has learned over the past five years. Read on to learn more about what's coming next.

Make sure you read Part 1 and Part 2.

Among the readers of this site, one of the cars that elicits a lot of passion is the Tesla Roadster. The battery-powered Roadster and its provenance have elicited a great deal of discussion over the past nine months, in particular since the demotion and ultimately the departure of co-founder Martin Eberhard. This is a complex tale involving passionate entrepreneurs with that all-too-common but in many ways necessary human frailty known as ego. When humans interact, they often see the same results through their own mental filters.

People can see exactly the same thing and interpret it in many different ways. Unfortunately in today's media landscape, particularly on television, but also in blogs we often see a very cut-down sound-bite version of things. Sound-bites by definition are taken out of context. In and of themselves they often lead to incorrect or at least inaccurate conclusions.

With all of that in mind I was recently contacted by Tesla Motors Chairman Elon Musk. Musk wanted to discuss his role at Tesla, and hopefully fill in some of the gaps in the story. What follows after the jump is the phone conversion that I had with Musk recently as well as some comments from Martin Eberhard via e-mail exchanges. Eberhard's version of events is italicized.

Update: Just to be clear Elon Musk contacted me immediately after a previous article where I called into question his role in the development of the Roadster. He wanted to clear up what he felt were misconceptions of his role rather than to pitch a story idea about him.

Madrid, Spain, is currently a very polluted city where 1.8 million vehicles are responsible for 75 percent of the pollutants in the air. Madrid's City Hall has decided that it will switch all its vehicles over to "clean" fuels, that is, they will be all running on electricity, natural gas, biodiesel or ethanol. The city also announced that it will join the BEST (BioEthanol for Sustainable Transport) European project to promote the use of ethanol in cars. Madrid has also worked out agreements with groups like taxi organizations that get up to a 75 percent discount on the road tax, depending on fuel.

[Source: Ayuntamiento de Madrid via Agroinformación]

When Larry Burns, GM's vice president of R&D and planning, spoke at the opening session of the AFVI expo yesterday morning, he stayed on target to bring GM's message to the conference. Before he stepped onto the stage, we had a chance to sit down with him and ask a few question

One thing I wanted to follow up with him about was his recent speech to the Hydrogen Fuel Association where he called for more government support for a hydrogen refueling infrastructure. Burns told me that in the six or so weeks since that speech, he's heard a bit of discussion and seen some movement on this issue. There's nothing to announce, but it seems there are still lots of people in government who listen to what GM wants. As for the customer side of the equation, Burns said that buyers will get excited about hydrogen cars once they have the chance to take a ride or a drive in a fuel cell car. Just take a look at Project Driveway, he said. We also talked about the 1970s Oil Shocks and the problem of reduced oil supply (you can't think of it in cyclical fashion; you need to think long-term, he said). Listen for yourself (12 min)

As we cover the automotive industry, we run across numerous events which lean, in one way or another, towards our green preferences. Some of these could be very influential on the industry while others are really more for fun. With that in mind, we've compiled a list of our top five favorite upcoming green events for Earth Day. Take a look-see starting with number five (or skip ahead using the list below) and let us know how you feel.

• Number five
• Number four
• Number three
• Number two
• Number one

When we were brainstorming ideas for Earth Day posts, we thought about featuring the ten most exciting green cars we wish we could buy today. It turns out that there are at least twice as many green rides on the horizon that we'd really like to have today, so the list has expanded. We'd like to note that this list is far from complete; the green sector of the automotive industry is growing in leaps and bounds. Start here and join us for a guided preview of our future garages or jump ahead by clicking on a number below. Either way, enjoy!

• Number 20
• Number 19
• Number 18
• Number 17
• Number 16
• Number 15
• Number 14
• Number 13
• Number 12
• Number 11
• Number 10
• Number 9
• Number 8
• Number 7
• Number 6
• Number 5
• Number 4
• Number 3
• Number 2
• Number 1

There you have it. Take a look at our list and, as always, feel free to share your own favorites in the comments.

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We met Jory Squibb way back in late 2006 over at the Santa Monica Alt Car Expo. How can you miss a guy driving a tiny, 100+mpg bubble car called the Moonbeam? Jory, from Maine, is now back on the ABG radar with his presence at the New York Auto Show. He didn't have a car with him this time, but he did have the idea for a competition vehicle for the Automotive X Prize with him. His new tadpole-style vehicle (that is, two wheels in front, one in back) is called Dirigo, which is the Maine state motto and means "I lead" of "I direct." The Dirigo's powertrain is based on a 950cc Daihatsu turbodiesel engine that sits in the back and drives the front two wheels. Jory told us the Moonbeam taught him that you really need at least half of your wheels providing power (the Moonbeam was also tadpole style, but only driven by the single rear wheel). Jory's team for the Dirigo, which is now a year old, is made up of about four regular members, some of whom are boat builders and are taking the Dirigo in a wooden direction. Learn more by listening to Jory yourself:



UPDATE: Jory sent in a few thoughts on the Auto X Prize at the New York Auto Show. We've pasted his essay after the jump.

Of the 60+ teams that have signed a letter of intent to participate in the Progressive Automotive X Prize, about 15 were on hand at the New York Auto Show. With only four cars on stage, it's easy to calculate that some teams arrived sans vehicle. The group from Motive Industries had just a little folded flyer to show what they've been working on for their entry vehicle. The basic idea for the as-yet-unnamed Motive vehicle is an electric car with an on-board ICE for range extension. The real challenge for Motive will be convincing everyone that "filling up" via quick, robot-aided battery exchanges are the way to go. Four-passenger and full size with biomaterials in the body panels and elsewhere, the vehicle is just now moving off of the design pages. Motive's Darren McKeage and Nathan Armstrong were in New York to give the public a first glimpse of this new car. You can view the flyer in the gallery below and listen to the duo by clicking play.

The Automotive X Prize announcer used it. We've been using if forever. And, until recently, MDI and Zero Pollution Motors were still calling their vehicles the Air Car. Now, though, to avoid confusion as much as possible, the preferred term is "Compressed Air Vehicle" (don't look now, but the ZPM website still says Air Car). At the New York Auto Show this week, we finally had a chance to sit down with Guy Negre, the creator of the CAV, and his partner Shiva Vencat (Vencat also provided translation for most of Negre's answers, as I don't speak French) for a talk on what happens next in the compressed air vehicle world.

The CAV team was in New York as part of the Automotive X Prize announcement, and I'm going to have to say that MDI/ZPM seems to be one of the stronger potential entrants into the race. While the design of the vehicle in New York won't appeal to everyone, I think the renderings for the MiniCat (is that what it's called?) could result in a solid X Prize entry. Plus, considering that deals with Tata have already been signed and the air car (whoops) technology has been tested for quite some time, the vehicle won't be bowing out of the race early, I don't think. To hear what Vencat and Negre have to say, listen to the interview yourself.

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When we saw the distinctive shape of the VentureOne under wraps before the start of the Progressive Automotive X Prize announcement, we were pretty psyched. While the appearance of this vehicle on stage does revive our hope that we'll be able to drive one of these high-mpg hybrids one day, the bad news is that this is just a full-scale model. While it looks good, it's not going to get anyone anywhere. Yet.

Venture Vehicles' founder and CEO, Howard Levine, was happy to be back on the AutoblogGreen radar and gave us the rundown on where his company goes from here and how the VentureOne - which is a codename for the vehicle, not the final moniker - will move into production. He explained that the lack of media attention hasn't meant they haven't been working, just that they have been focusing on the vehicle, not on building hype. One of the big decisions the company has made is to offer only a hybrid version at launch, the pure electric option will have to wait until battery prices come down. Want more info? Listen to Levine yourself by clicking play.

Sallie Hirsch, left, and Lois Miller.

One of the quieter announcements from the New York Auto Show was that a Subaru ad called Soul of Subaru - Values won the Green Award from Intermedia Advertising Group (IAG). The ad won not because a panel of judges thought it was the best but because IAG discovered, based on customer research panels, that this particular ad was the most effective. This meant that the ads left more viewers with the idea that Subaru was a green car company than anything else on TV last year. This week, I spoke with Sallie Hirsch, senior vice president of automotive research, and Lois Miller, president of IAG Automotive, to figure out not only why and how this commercial won (Subaru's overall clean message played a big role) but about TV green car advertising in general. While average, non-green ads still dominate the airwaves, there were more green car ads in 2007 than ever before. Not the most surprising bit of informatin, but well worth keeping an eye on. IAG does just that, and you can get a peek into the industry by clicking play on the widget below.

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If the person being interviewed in the picture above looks a little bit young, well, that's because he is. He's a student at the West Philadelphia High School Academy for Automotive and Mechanical Engineering, which is fielding the youngest team of entrants in the Progressive Automotive X Prize.

I had a chance to speak with the teacher in charge of the program, Simon Hauger, who talked about the three (or four, depending on how you count) green vehicles the team has worked on over the past nine years. From an early converted Jeep(s) to the Hybrid Attack you see in the photo gallery, the team knows a few things about greening up a ride. The team took a K1 Attack and modified it to biofueled hybrid that won the Northeast Sustainable Energy Association's Tour de Sol twice. Can high school students win the Auto X Prize? They certainly have the passion, as Hauger describes. For the X Prize, the team is working on another vehicle, this one a plug-in diesel hybrid. The team says the car will exceed the 100 mpge requirement "without sacrificing style, safety or affordability." That's the dream, right?

In the general hub-bub before the Automotive X-Prize kick-off event yesterday, we cornered Progressive Insurance's President and CEO Glenn Renwick for a few brief moments to get his thoughts on the prize. I mean, it's his company that is putting up the ten million dollars in prize money, so you can bet he's thought long and hard about paying someone that much for a freakin' car. While insurers are not usually known for being happy about seeing money go out the door, Renwick said he hopes the company does indeed fork over the money at the end of the race. Renwick said (rightly, IMHO) that he considers the sponsorship to be simply another way of advertising, and as such is coming out of the company's general advertising budget. You might now see fewer Progressive ads on TV, but you'll be seeing the name much more here on ABG. Fair trade? That's not for me to decide.

Look at it from another angle: if we don't figure out a way to move to highly-efficient personal vehicles (and higher gas prices continue climbing as a reflection of dwindling supplies), what would Progressive have to insure? This might be the best $10m they ever spend. Give Renwick a listen using the flash widget below.

When the U.S. Congress passes or is about to pass some legislation relating to issues of automobile safety or vehicles' ecological impact, the Auto Alliance speaks up. Why do we only hear from the group on these issues? The Alliance's Charles Territo sat down with us at the New York Auto Show to explain how ten large automakers - BMW, Chrysler, Ford, General Motors, Mazda, Mercedes Benz USA, Mitsubishi, Porsche, Toyota and Volkswagen - work together. The short answer is that, when it comes to safer and cleaner driving, the industry can agree on what needs to happen: cars need to be, well, safer and cleaner. For example, the Alliance is hyper-excited for alternative fueled cars, which it defines as vehicles available today that don't rely exclusively on gasoline. In this case, that means hybrids, diesels and flexfuel cars. When it comes to specifics like which powertrain technology is best or which bodystyle to promote, well, that's where the companies fight and snipe, all trying to get your dollar. Give Territo a listen by pushing play in the widget below.

When we first encountered the Milner Motors ElectriCar yesterday, we just did a quick flyby with out cameras and then headed off to other events. Later in the afternoon, we returned for a 15 minute chat with Chris Milner, the AirCar inventor's son and a partner in the company. He talked about the design of the car, the potential roadmap from this early prototype stage to a production vehicle and why this is so much like the AirCar with its wings lopped off. And yes, Milner's AirCar and the MDI Air Car are two different beasts. Chris said he's more than aware of the credibility issues involved when you try to build a flying car but, should the ElectriCar make it to production, the profits could be used to fund further development of the Air Car. Get ready.