Connect with us

Published

on

Right now, the FAA is taking public comments for SpaceX’s environmental review of the upcoming Starship Orbital launch. While I generally support space exploration and hope SpaceX succeeds, it’s important to consider the environmental impacts of space activities and find ways to reasonably minimize the environmental impacts.

The Use of Methane For Rockets Is Mostly Defensible

From an environmental perspective, a rocket should be powered by hydrogen. Burning hydrogen combines hydrogen with oxygen from the atmosphere, producing only water vapor in the exhaust. The water vapor harmlessly diffuses in the atmosphere, and doesn’t contribute to climate change or any other environmental harms. Hydrogen rockets are also a proven technology that took the United States to the moon, so it’s entirely possible to use hydrogen for space launches.

But hydrogen does have some serious drawbacks.

Being a small molecule, it’s very difficult and expensive to make sure a rocket doesn’t simply leak its fuel out. Every weld must be absolutely perfect. Every seam must be carefully sealed. All joints and fittings from tanks to engines must have perfect seals. All of that need for perfection means a lot more work, expense, and even danger.

The second problem with hydrogen is that it makes metal more brittle. This again drives up the cost of safely building a hydrogen rocket. Other problems include the low energy density compared to other fuels, temperature control, expense, and complexity of the systems needed to handle it properly. It’s also not easy to produce on Mars, so it wouldn’t be suitable for a Mars colony.

Methane (the purest form of “natural” gas) is the next best thing. It does produce carbon dioxide when it’s burned, but that’s basically all it produces (other than water vapor, like any combustion reaction). Unlike RP-1 or other rocket fuels, it does contribute some to greenhouse gases, but doesn’t spew out other pollutants.

Given the costs of hydrogen and the fact that methane is only a little worse, going with methane was the obvious choice, even if not perfect for the environment.

All The Methane Has To Come From Somewhere, Though

While assessing environmental impacts, the FAA didn’t factor one thing in: the source of the natural gas that would feed SpaceX’s Starbase.

The obvious thing they’ll need natural gas for is the rockets. For those unfamiliar, natural gas is mostly methane, and while it’s good enough for things like furnaces and power plants, the gas that’s normally in pipes just isn’t pure enough for use in rockets. So SpaceX needs a facility to take natural gas in, purify it, and then cool it down until it changes to a liquid state. Then, it’ll be ready to pump into a rocket’s tank and use for launches.

But they didn’t mention the source of all this natural gas in the report. Theoretically, they could truck the natural gas in using tanker trailers, but that would be expensive, cumbersome, and would take a LOT of trucks. The other, more reasonable, option would be to reactivate a natural gas pipeline that runs through the Lower Rio Grande Valley National Wildlife Refuge. The pipeline, which was abandoned in 2016, is currently holding fiberoptic cables for a local educational institution.

So, SpaceX may still be able to use the pipeline, or it may have to build a new one.

The other thing that hasn’t been considered in the report is that the gas has to get put in the pipeline from somewhere, and the areas near Brownsville just don’t produce enough gas to feed the needs of  SpaceX at Starbase, so more gas will be needed from at least 80 miles away. That means more wells, more pipelines, and more environmental impact that isn’t currently being considered.

SpaceX Is Also Building a 250-Megawatt Gas Power Plant

Getting methane for rockets would probably be something the nearby wells could supply, with minimal gas needs from elsewhere in the state, and that would be reasonable. But, add the needed fuel for a 250-megawatt power plant that runs on natural gas, and you end up in the situation described above. There just isn’t enough local gas to power the rockets plus a big power plant.

According to TechCrunch and ESG Hound (both linked above), the power plant will be needed to power a desalination plant to provide for Starbase’s water needs, as well as to provide for the base’s other electrical needs.

Desalination makes sense, given the limited water supplies in the area and the abundance of salt water, but the equipment to do that isn’t picky about where its electrons come from. Whether it comes from natural gas, or comes from wind and solar, as long as the power keeps coming in, they’ll be able to produce the needed water.

So, Why Isn’t SpaceX Using Renewables?

Given that the company is already planning on piping in gas, and getting more gas is relatively cheap, it’s probably the cheapest solution overall.

But, really, south Texas has great solar resources.

Image provided by the National Renewable Energy Laboratory (NREL). Public Domain.

Sure, it’s not as red hot as it is in El Paso, but Brownsville still has better quality sunlight for solar power production than most of the country. There’s not much in the way of excuse to not build a big solar power plant with storage to supply the desalination plant’s needs, as well as other needs at Starbase. You probably couldn’t build a plant that big right next to Starbase, but you could find some vacant land in the region to supply enough power.

Brownsville only has 223 sunny days per year, which could make an issue, but there’s no reason to not go further away in Texas for power. El Paso and other parts of far west Texas, as close as Big Bend, have over 300 sunny days per year.

Getting the power from the vacant land to Starbase, whether from nearby or farther away, is an issue, but so is the issue of building pipelines. If you can build pipelines, then you can build power lines. Plus, power lines don’t leak and cause other environmental harms the way that gas lines do.

The cost of doing 250 megawatts of solar is probably higher than 250 megawatts of gas, but it doesn’t make sense to be trying to save the species with Tesla and then turn around and burn natural gas for SpaceX’s space colonization efforts.

 

Appreciate CleanTechnica’s originality? Consider becoming a CleanTechnica Member, Supporter, Technician, or Ambassador — or a patron on Patreon.

 

 


Advertisement



 


Have a tip for CleanTechnica, want to advertise, or want to suggest a guest for our CleanTech Talk podcast? Contact us here.

Continue Reading

Environment

CES2025 | John Deere autonomous mower promises a perfect cut, every time

Published

on

By

CES2025 | John Deere autonomous mower promises a perfect cut, every time

At CES2025, the impressively built-out John Deere exhibit was all about automation. Autonomous job sites, autonomous farms … but it was this new, battery electric, autonomous lawn mowing robot that stole the show.

The self-driving Deere mower robot was positively dwarfed by the giant farm machinery surrounding it, but it continues to prove that humans will pack bond with anything as more than one burly-looking and grizzled man asked what its name was. (It’s Howard. I’ll fight you.)

For his part, Howard packs a 21.4 kWh battery pack that runs a suite of electric motors that includes a drive motor and three cutting blade motors spread across a 60 inch cutting deck – but it’s not the electric motors that make John Deere’s little robot mower cool, it’s the way it works.

See, instead of using “just” GPS data or “just” repeating a pre-recorded run, Howard can do something in between. The way it was explained to me, you would ride the stand-up mower around the perimeter of the area you wanted to mow, select a pattern, then hop off, fold up the platform, and let it loose. Howard mows just the way you would, leaving you to focus on edging, planting, or (let’s face it) schmoozing with the clients.

It’s exactly the sort of help landscapers are looking for.

But that should come as no surprise, of course. John Deere, perhaps more than most companies, knows its customer. “We’ve been in the turf business for 60 years — it’s a core part of Deere,” says Jahmy Hindman, chief technology officer at John Deere, explaining things beautifully. “The work that’s being done in this industry is incredibly labor intensive … they’re not just doing the mowing work. They’re doing the tree trimming, maintaining flowerbeds and all these other jobs. The mowing is table stakes, though, for them to get the business. It’s the thing they have to do in order to get the higher value work.”

Tim Lewis, lead engineer with the commercial automatous mower, told Lawn & Landscape that the industry in general has a high turnover rate as well, making it difficult to hang to people who know where one job ends and another begins. “There’s a lot of nuances it takes to do these jobs effectively,” he explains, “so “Autonomy can help with that.”

The John Deere autonomous commercial mower (there’s no snazzy alphanumeric, yet) leverages the same camera technology as other Deere autonomous machines, but on a smaller scale (since the machine has a smaller footprint). With two cameras each on the front, left, right, and rear sides of the little guy, he has a 360-degree view of the world and enough AI to lay down a pattern, avoid an obstacle, and shut off if it thinks it’s about to mow down something (read: someone) it shouldn’t.

John Deere will have Howard on display through tomorrow at CES in the LVCC’s West Hall. If you’re in town, be sure to go say hi.

John Deere CES2025

SUOURCE | IMAGES: John Deere; Electrek.

FTC: We use income earning auto affiliate links. More.

Continue Reading

Environment

Tesla sales fall, Honda brings back ASIMO, and a bunch of stuff from CES2025

Published

on

By

Tesla sales fall, Honda brings back ASIMO, and a bunch of stuff from CES2025

Despite big discounts and 0% financing, Tesla sales are down for the first time in a decade … but there’s even bigger robot news with the return of Honda ASIMO, a flying car from China, and a whole lot more from today’s episode of Quick Charge!

CES2025 was all about AI – and not just what AI could do, but what AI could do for you. That’s where ASIMO comes in, helping everyone have a better time in there car and not at all just a modern day version of KITT dreamed up by a bunch of Gen X executives (wink, wink). We also cover some neat stuff from Suzuki, Aptera, Volvo, and more. Enjoy!

Prefer listening to your podcasts? Audio-only versions of Quick Charge are now available on Apple PodcastsSpotifyTuneIn, and our RSS feed for Overcast and other podcast players

New episodes of Quick Charge are recorded, usually, Monday through Thursday (and sometimes Sunday). We’ll be posting bonus audio content from time to time as well, so be sure to follow and subscribe so you don’t miss a minute of Electrek’s high-voltage daily news!

Got news? Let us know!
Drop us a line at tips@electrek.co. You can also rate us on Apple Podcasts and Spotify, or recommend us in Overcast to help more people discover the show.

FTC: We use income earning auto affiliate links. More.

Continue Reading

Environment

This is the Tesla Model Y Juniper refresh, just unveiled in China

Published

on

By

This is the Tesla Model Y Juniper refresh, just unveiled in China

Tesla has officially unveiled the Model Y “Juniper” refresh, less than a day after uncamouflaged photos of the vehicle leaked online.

The refreshed Model Y, codenamed Juniper, has been expected for some time, and was expected to include many of the improvements of the 2023 Model 3 refresh.

In October, Chinese social media said the refresh was about to enter trial production, and just days later we saw a photo of the refreshed Model Y outside the Shanghai factory. Then last month, we heard that mass production would start in Shanghai in January, so we can expect that very soon as well.

And while Tesla said in 2024 that there’s no Model Y refresh coming “this year”, 2024 is over now, and the refresh is here.

Today, Tesla updated its Chinese website with all the information about the refreshed Model Y, with many of the same improvements as the Model 3 refresh like a quieter cabin, higher efficiency, more performance, ambient lighting and a rear screen.

According to Tesla’s site, the new Model Y can achieve 719km of range (446mi) in Long-range AWD spec with 19-inch wheels, but this is based in CLTC estimates, which are much more lenient than EPA. Previously the highest-range spec had 688km CLTC range, so that’s about a 20-mile improvement.

The 20″ wheels on the long range version will take you 662km, and RWD standard-range batteries will go 593km or 559km on the 19″ and 20″ wheels respectively.

We imagine this could translate to roughly ~350 miles of range on the top-spec Model Y on EPA ratings, but we’ll have to see when the car gets released in the US.

Acceleration has also been improved, with Tesla saying the large-battery AWD Model Y can achieve 0-100km/h (0-62mph) in 4.3 seconds, down from a previous 4.9. The RWD version does the same sprint in 5.9 seconds. Both of these numbers would be slightly shorter for 0-60 times, because of those extra 2mph at the end.

There is no performance version yet – just as with the post-refresh Model 3, which didn’t get a performance spec until later.

The exterior design is just as leaked photos suggested, with the same rear end we saw in leaks in July and the front end that we saw earlier today. Though now we get to see it in higher resolution and better lighting.

The front-end includes a Cybercab/Cybertruck-like “light bar” rather than the more traditional-looking headlights of the Model 3 refresh, and has been narrowed to remove the “duck lip” bump at the front of the hood.

Also on the front end is a new front bumper camera (again, like the Cybertruck, but unlike the Model 3), which should help with parking and also offer an additional point-of-view for Tesla’s Autopilot software. The inclusion of this camera, while it will improve Autopilot accuracy, does lead to questions over whether previously vehicles that don’t have a front bumper camera will be able to achieve the same level of accuracy as refreshed vehicles do.

And the interior design changes are also roughly as expected, though the steering wheel has undergone less radical changes than some had hoped.

Earlier today, photos leaked suggesting that the Model Y would receive a similar “squircle” steering wheel as the Cybertruck, leading to speculation that it might also receive the Cybertruck’s steer-by-wire system. But it turned out that those photos were just a Model 3 with a custom steering wheel.

The actual interior of the Model Y maintains a circular steering wheel, which suggests that it won’t get steer by wire (the steer-by-wire specification isn’t listed on Tesla’s Chinese site for the car).

It does however have photos showing missing steering column stalks, which has been a controversial feature of the Model 3.

However, looking closer at the steering wheel, the turn signal buttons from the Model 3 are not present. It looks like Tesla may have included a vestigial turn signal stalk hiding behind the steering wheel, and just deleted the PRND drive mode stalk.

This is still a controversial change, as changing drive modes through the screen isn’t the most popular feature, but the turn signal deletion was particularly egregious and it’s good to see it back. We wonder if the Model 3 might eventually gain this improvement, or whether this will be different in different regions.

Tesla says the new “acoustic glass” in the Model Y reduces interior noise significantly. The Model 3 also got this improvement, and testing does show a significant improvement in interior noise levels as a result.

The Model Y receives other interior improvements seen on the 3, like a screen for the rear seat. The Cybertruck also includes this screen.

This shot also shows the ambient lighting LED strip across the dash, which can be customized through the vehicle’s UI.

Another rear-end improvement is electric rear seats, operated through a button in the trunk. This button gives easier access to rear storage space, allowing owners to fold the rear seats up or down while loading or unloading cargo.

Tesla’s Chinese website calls these “anti-gravity” seats, but it’s unclear what exactly the improvements might be in this respect. The seats are ventilated.

First deliveries are scheduled for March in China, subject regulatory approval, though Tesla’s configurator says “the specific delivery date will vary depending on the configuration and pick-up location and other reasons.”

Tesla is offering a “Launch series” in China, something that Tesla has done with many of its cars, but hasn’t done before in the US with the Model 3/Y. It includes some unique design elements and “Launch series” badging in various parts of the vehicle.

As for other regions, they will probably have to wait. The Model 3 refresh came out in Europe first, and the US needed to wait months for it. This is particularly likely now given new US tariffs on Chinese-built cars (which are a bad idea).

Electrek’s Take

As I wrote in the Take section of our leaked photos article earlier today, this refresh is needed, because not only has the Model 3 had access to lots of improvements that the Model Y hasn’t gotten for the last year and a half or so, but Tesla is having a challenging time with sales right now.

The company just finished a year where its sales dropped for the first time since 2011 – back when Tesla only sold the low-production Roadster. This happened despite the overall global EV market surging to new heights, even though Tesla, the world’s largest EV maker (just barely), did its part to drag down the EV market by failing to grow apace with the rest.

Part of the reason for this is due to stale models – while the Model Y is Tesla’s best-selling model, it’s starting to seem a little long in the tooth, particularly given the Model 3’s upgrades. So we wondered earlier today whether the Model Y refresh could reignite Tesla’s growth.

But it’s not just about models. After all, Tesla did just finish its first full year of Cybertruck production, which is a new model, but its polarizing nature led to disappointing sales numbers.

That polarization is not helped by Tesla CEO Elon Musk, who is doing his best to harm the company and say phenomenally stupid things or make ridiculous promises basically every day (or every few minutes). His idiotic behavior is turning away customers, whether he believes it or not.

Maybe the company – not the stock – would be better off if he surrendered his title and let Tesla have a real CEO, so he can go play videogames on twitter all day instead (as he already does).


Charge your electric vehicle at home using rooftop solar panels. Find a reliable and competitively priced solar installer near you on EnergySage, for free. They have pre-vetted installers competing for your business, ensuring high-quality solutions and 20-30% savings. It’s free, with no sales calls until you choose an installer. Compare personalized solar quotes online and receive guidance from unbiased Energy Advisers. Get started here. – ad*

FTC: We use income earning auto affiliate links. More.

Continue Reading

Trending