Recent comments in /f/science

Angiellide t1_jcap17m wrote

I’m surprised to hear you say you work at a public power company while also imagining that local solar could power local things and “runoff” could be sent elsewhere. That isn’t how electricity works at all. You can’t control where an electron goes once released into the grid and the frequency needs to be maintained within a very narrow range so the load needs to exist at the same time the energy is created. Having solar on your roof doesn’t mean you get “your” electrons powering your house.

I’m not really sure we can continue this when you’re going to say “yes but storage” .. electricity going to storage is also a load — i.e. we can have more solar when we’re prepared at utility scale to need it .. why would we build utility’s scale batteries and also not build the utility’s scale solar to go with it but still have any need to put thin film everywhere. Regardless of progress, distributed solar will never be cheaper than utility because distributed has unique installations that don’t benefit from scale or learning.

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ShankThatSnitch t1_jcamdpl wrote

Yes, our grid also needs upgrading. This is very true and not well understood. But local solar would first power local stuff, and then runoff would be sent to storage facilities, which could also be local, with the next step being municipal. Those could be battery, chemical, mechanical, hydrolic...etc

Of course, all of this has to be done at cost, or else it is useless. But again, as solar scales up, these other things are being worked on, too. Solar is still only like 3-4% of total electricity, so this will all take many years.

I actually work at a public power company, and I hear them talk about the challenges that need to be worked out with the grid and rooftop solar...etc. But this stuff is hardly the biggest challenge humans have tackled.

We have built out massive infrastructure for oil, coal, and gas extraction and refining. Pipelines, gas station networks, and war machines to secure energy sources around the world. We can certainly figure out a well managed solar power network. It just takes time.

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CatchingRays t1_jcakmj1 wrote

Facebook did a thing a while back where it labeled misinformation. That looked like a good step. Once an bad story or source is found out, can a platform message users that shared it with the info/data dispelling it? Point out the nefarious actors? Along with a compassionate note about it being hard to tell sometimes? And some notes about what could have tipped them off? I know I'm asking for a lot here, but platforms have an opportunity to educate their users. Little by little improve the experience of their site overall.

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Angiellide t1_jcak36g wrote

It’s not just a matter of creating energy but of managing the grid. The power on the lines needs to be balanced with the load in real time second by second. Generation sources need to be shut off and turned on to make that happen but solar panels are difficult to impossible to shut off. More or less they need to be covered physically which can’t be done on distributed solar.

During much of the day real time electricity prices are actually negative. We don’t need radically more day time electricity from slapping thin film in every place we can think of. The priority needs to be on the ability to manage the grid or else we force more stable, lower or no carbon sources of energy offline & need to rely on natural gas peakers for the dark hours when we have most energy demand. The combo of just solar & natural gas is potentially worse for the environment than no solar but better managed non-renewable plants.

Don’t confuse this with me being against sustainable energy. The grid management aspect of solar is just really poorly understood and leads to a lot of pressure for things that don’t align with the real goals.

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-downtone_ t1_jcaiusi wrote

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ShankThatSnitch t1_jcahxw4 wrote

Well, obviously, utility scale is the main focus, but as technology improves and costs curves keep coming down, I see no reason why we won't come up with cost effective thin films that can line all kind of things.

As for storage, I agree, that is the biggest hurdle, but there are many ideas being researched for that. Solar is still a relatively small % of electricity, so storage can be figured out as we scale up.

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ShankThatSnitch t1_jcaheml wrote

Things can be recycled. The difference with solar to fossil fuels, is onelce the thing is made, it just works for many years before needing to recycle. Fossil fuels are vaporized the moment we need them. No getting those back.

Some types of solar arrays are just mirrors that red-light and boil liquid to spin turbines. And I am sure we will come up with many other types of panels as well.

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RRoyale57 t1_jcag1of wrote

DuPont invented polyester and it’s in everything!!!! It’s literally polyethylene that’s made to feel like cotton but it’s plastic! That nice super plush blanket you have is most likely made of 100% polyester. Now go cuddle up with it for 8 hours. Then wake up and put on clothing that contains it too. It’s everywhere!

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Blades137 t1_jcadzl0 wrote

Probably much longer than that, for all we know these traits have probably existed since man (and women) first walked the earth.

Just because there are no physical written records, doesn't mean this type of "thinking" didn't exist back then too.

It should be noted as well, that what people believe is often rooted in emotion, not logic.

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chrisdh79 OP t1_jcabg3g wrote

From the article: A University of Sydney-led review into the benefits of the Mediterranean diet in women has found women who followed a Mediterranean diet had up to 24 percent lower risk of heart disease and a 23 percent lower risk of death.

The researchers say to their knowledge this study is the first review to examine the association between the Mediterranean diet, cardiovascular disease and mortality specifically in women.

The findings, published in Heart Journal, examined data from 16 published studies where women were following the Mediterranean diet. The studies were between 2006 and 2021 and involved over 722,000 female participants.

Interestingly, further analysis of data found similar reduced risk applied in women of all ethnicities, with women of European descent having a 24 percent lower risk, and women of non-European descent (Asian, Native Hawaiian and African American) having a 21 percent lower risk.

The results will be invaluable in updating the dietary and clinical guideline recommendations such as the Australian dietary guidelines for diets in women, particularly to help prevent heart disease. The latest report comparing Australian women’s diet to national dietary guidelines found less than 1 in 10 Australian women are meeting fruit and vegetable intake guidelines.

University of Sydney PhD candidate at the Westmead Applied Research Centre (WARC) Ms Anushriya Pant said a Mediterranean diet – high in fruits, vegetables, wholegrains, legumes and healthy fats like olive oil and nuts, with a moderate intake of seafood and lean protein is known for its heart health benefits but its impact by sex has never been explored.

“The Mediterranean diet is known for its health benefits, especially for heart health, but most studies and research into diet and heart disease are done primarily in men,” said Ms Pant, who led the analysis.

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