651
Motor emissions could have fallen by over 30% without SUV trend, report says
(www.theguardian.com)
this post was submitted on 25 Nov 2023
651 points (97.7% liked)
World News
39161 readers
1885 users here now
A community for discussing events around the World
Rules:
-
Rule 1: posts have the following requirements:
- Post news articles only
- Video links are NOT articles and will be removed.
- Title must match the article headline
- Not United States Internal News
- Recent (Past 30 Days)
- Screenshots/links to other social media sites (Twitter/X/Facebook/Youtube/reddit, etc.) are explicitly forbidden, as are link shorteners.
-
Rule 2: Do not copy the entire article into your post. The key points in 1-2 paragraphs is allowed (even encouraged!), but large segments of articles posted in the body will result in the post being removed. If you have to stop and think "Is this fair use?", it probably isn't. Archive links, especially the ones created on link submission, are absolutely allowed but those that avoid paywalls are not.
-
Rule 3: Opinions articles, or Articles based on misinformation/propaganda may be removed. Sources that have a Low or Very Low factual reporting rating or MBFC Credibility Rating may be removed.
-
Rule 4: Posts or comments that are homophobic, transphobic, racist, sexist, anti-religious, or ableist will be removed. “Ironic” prejudice is just prejudiced.
-
Posts and comments must abide by the lemmy.world terms of service UPDATED AS OF 10/19
-
Rule 5: Keep it civil. It's OK to say the subject of an article is behaving like a (pejorative, pejorative). It's NOT OK to say another USER is (pejorative). Strong language is fine, just not directed at other members. Engage in good-faith and with respect! This includes accusing another user of being a bot or paid actor. Trolling is uncivil and is grounds for removal and/or a community ban.
Similarly, if you see posts along these lines, do not engage. Report them, block them, and live a happier life than they do. We see too many slapfights that boil down to "Mom! He's bugging me!" and "I'm not touching you!" Going forward, slapfights will result in removed comments and temp bans to cool off.
-
Rule 6: Memes, spam, other low effort posting, reposts, misinformation, advocating violence, off-topic, trolling, offensive, regarding the moderators or meta in content may be removed at any time.
-
Rule 7: We didn't USED to need a rule about how many posts one could make in a day, then someone posted NINETEEN articles in a single day. Not comments, FULL ARTICLES. If you're posting more than say, 10 or so, consider going outside and touching grass. We reserve the right to limit over-posting so a single user does not dominate the front page.
We ask that the users report any comment or post that violate the rules, to use critical thinking when reading, posting or commenting. Users that post off-topic spam, advocate violence, have multiple comments or posts removed, weaponize reports or violate the code of conduct will be banned.
All posts and comments will be reviewed on a case-by-case basis. This means that some content that violates the rules may be allowed, while other content that does not violate the rules may be removed. The moderators retain the right to remove any content and ban users.
Lemmy World Partners
News !news@lemmy.world
Politics !politics@lemmy.world
World Politics !globalpolitics@lemmy.world
Recommendations
For Firefox users, there is media bias / propaganda / fact check plugin.
https://addons.mozilla.org/en-US/firefox/addon/media-bias-fact-check/
- Consider including the article’s mediabiasfactcheck.com/ link
founded 1 year ago
MODERATORS
you are viewing a single comment's thread
view the rest of the comments
view the rest of the comments
All of that can be fixed. But one thing that can't be done is improve energy density of Lithium batteries. Simply put they are too heavy for the amount energy they store, have issues in cold weather, prone to mechanical failures, etc. Even if high pressure tanks are more expensive, we could start with lower pressure ones and work our way up as technology improves. Simply put it scales better.
Unless you’re talking cryo, it’s practical density is not great at all. And if you are talking LH, you’re insane.
It’s not just a question of the mass of the fuel itself that matters- it’s also all the mass of everything needed to contain it, and when you account for that, the low pressures of gas stored hydro is a joke (and the reason we haven’t created hydrogen cars, Toyota isn’t doing anything that hasn’t already been done,) and LH tanks are… a bomb waiting to go off when Karen is late for the kid’s hockey game,
That said there are other battery technologies coming down the pipeline that don’t rely on lithium. Sodium ion, for example, or there’s the “old” work horse in space- the nickel-hydrogen battery.
Energy density can be designed around- they’re doing it with lithium cells, and with hydrogen ice. Lithium isn’t offensive because of its energy density, it’s offensive because of how the lithium (and other rare earths) are sourced. NH2 batteries don’t have that problem as much. Nickel and iron are both much easier to extract and recycle than lithium- and the other compontemt is hydrogen gas with some some KOH mixed in. The other primary advantage of NH2 batteries is their recharge cycle count is north of 20k- an order of magnitude more than other batteries (and the reason nasa uses them.)
So there may be some changes to habits, and it might be necessary to use hydrogen ICE in trucking and other long haul transport. But EVs for consumer vehicles are where it’s going.