For more on HEPA and CADR, see our primer on HEPA and CADR filtration testing. According to AHAM, your air purifier should have a CADR rating equivalent to about two-thirds the area of your space (in square feet). CADR tells you how much air (in cubic feet per minute) an air purifier can process within one minute. Clean air delivery rating, or CADR: The Association of Home Appliance Manufacturers (AHAM) works with independent laboratories to certify air purifiers that meet its standards.You can learn more about HEPA filters here. That’s why experts recommend you shop for HEPA-level filtration and note each air purifier’s clean air delivery rate (CADR) which gives you more information about how well an air purifier will clear a given space of contaminants (including tobacco smoke, dust and pollen), its primary purpose. High-efficiency particulate air (HEPA) filters: Every expert we spoke to agreed that HEPA is crucial for filtration, but HEPA isn’t a centrally regulated standard, so shopping for these filters can be complicated.There are two standards and testing procedures, HEPA and CADR, that help show how efficiently air purifiers clear the air in a room. Shopping What type of air fryer should you buy? How to find the best air purifier for youĮxperts agree that filtration is key when choosing an air purifier. To help guide your search for an air purifier that best suits your needs and budget, we consulted health and filtration experts to learn more about air purifiers and what you need to know before buying one. These airborne particles enter your lungs, causing irritation or triggering allergic reactions, explained Kenneth Mendez, president of the nonprofit Asthma and Allergy Foundation of America. SKIP AHEAD Best air purifiers| Other highly rated air purifiers to consider | What is a HEPA filter? | Tips for maintaining good air qualityĪir purifiers are designed to remove indoor air pollution from cooking, car emissions, or dust from wildfires, among other contaminants. Air purifiers, which filter particles from the air, can help reduce indoor air contaminants that arise from everyday life However, the truth might surprise you: According to the Environmental Protection Agency, the air inside your home can be more polluted than the air outside. If you live in wildfire territory, or a smoggy city, you may feel that the air inside your house is cleaner, or safer than the air outside.
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So far, popular mineable coins like Dogecoin and Bitcoin have been flat or down since The Merge. With all those displaced miners, we could see them switch to other cryptocurrencies that still use proof-of-work. Ethereum's price dropped about 10 percent when The Merge went into effect, but it has been stable throughout the day. It's uncertain if this effort will be successful, but several exchanges and crypto firms are on board. The EthereumPoW (ETHW) project includes a copy of all ETH-backed tokens, NFTs, DApps, and liquidity pools, but it will use the proof-of-work model going forward. Some miners have announced their intention to do a "hard fork" of the Ethereum blockchain. Although, not everyone is happy about the change - especially those who spent millions of dollars to buy mining hardware over the past few years. Large mining rigs can contain dozens of GPUs, and not one of them is being used for fragging noobs. Moving cryptocurrencies like Ethereum to proof-of-stake eliminates the need to acquire rack after rack of GPUs. While the recent cratering of crypto prices has made GPUs somewhat easier to buy, that could change if prices shoot up again. There's another potential upshot: video cards could be easier to buy. This approach is seen as more sustainable as it doesn't waste energy burning up video cards with endless hashes. The minting rate is determined by how much ETH a node has and how long it has had it. In moving to proof-of-stake, miners become "minters" who support the blockchain by storing Ethereum. For doing this, they get rewarded with a small amount of cryptocurrency. (Opens in a new window) In proof-of-work models, miners run increasingly complex calculations to verify transactions on the blockchain. 15 (Opens in a new window), triggering the move to proof-of-stake. The switch happened once Terminal Total Difficulty (TTD) surpassed 58,750,000,000T and the final block was found. Ethereum started moving toward The Merge earlier this month when the "Bellatrix upgrade" was rolled out. Ethereum co-founder Vitalik Buterin reminded everyone that The Merge by itself will lower global energy usage by 0.2 percent. There could be some rough times ahead as the market comes to terms with such a major change, but this seems like a win for almost everyone. According to the Ethereum Foundation, the transition from PoW to PoS reduces the Ethereum total network’s energy consumption by at least 99.95 (figure 2), or 2.62 megawatts equivalent to a small town of around 2,100 American homes. The world's second-largest cryptocurrency has switched to the proof-of-stake model, which slashes the blockchain's energy usage by 99 percent. In response, some major bitcoin miners are starting to seek out renewable energy to power their data centers and trying to change the narrative by touting bitcoin's energy use as an asset, as it helps drive investment into the nation's aging electrical grid.After numerous delays and near-constant uncertainty, Ethereum has finally completed The Merge. However, the optics of bitcoin's energy use in the midst of the global climate crisis has become a problem for the network. Ethereum proponents say this penalty will make the network more secure, while bitcoin enthusiasts see proof-of-work as the more secure, tried and true approach. If a validator tries to attack the network, they'll lose their stake. To ensure that these validators act honestly, they essentially have to make a security deposit by staking a certain amount of ether coins into the network. Instead of playing a massive computational guessing game, validators are assigned to verify new transactions, and earn ether as a reward for doing so. But now the network has swapped out miners for validators. This is the system formerly used by ethereum. But recent research also shows that in 2020, mining bitcoin consumed 75.4 terawatt hours of electricity, more than all of Austria or Portugal. All of this work helps to secure the network by making it nearly impossible for bad actors to accrue enough computing power to take control. This is what's known as mining.Īt the moment, guessing a winning number takes more than 100 sextillion tries. Instead, the bitcoin network is sticking with a system called proof-of-work, in which highly specialized computers try to guess a winning number that serves to validate transactions and create new coins. Personal Loans for 670 Credit Score or Lower Personal Loans for 580 Credit Score or Lower Best Debt Consolidation Loans for Bad Credit Iceland, a place that I've always loved, has a population of just 330,000 (according to the latest stats). The film is beautifully shot and they chose, pretty much, the perfect country to tell this story in. Riley chose to focus on the positives that this new situation could bring them. But her depression, more than her love for Riley, won over and I can't say that I blame her. I may freak out at something that someone else is completely unfazed by. And I'm not saying that she had to, we all react differently to different situations. I sincerely believe that, Jenia's fate was sealed the moment she failed to adjust to her new situation. Jenia's depression, her desire to find someone else and finding the answers to questions that will never be answered (not matter how hard she tries) would have, eventually, gotten the better of her. I believe Jenia's fate would have been the same either way, regardless of whether it had been when it happened in the movie, or at a later time that we may not have even seen. That dynamic is a very interesting one, if not necessarily a unique one. She is a person who's struggling to find answers where there are none to be had. She laments her current situation, she loathes the fact that she will never get to go home again, see her house, hold her own belongings, among many other things. Jenia has a much more emotional reaction to this. He's not necessarily positive, but he's acclimating very well to their change in lifestyle, he's just going in the direction the world points him in, as it were. Riley is more open-minded about the whole thing. I thought the film would explore the relationship dynamics between Jenia and Riley and, in a way they do, but it relates more to how each of them adjusts to their current situation. But I digress, I feel the story is more how both Jenia and Riley adjust to their new situation and their surroundings since, basically, Iceland (a country they know nothing about and is completely foreign to them) will now have to act as their home. This story was never told from the point of view of 'we have to figure what went wrong' and therefore not getting answers shouldn't be a drawback. That story wasn't meant to have fight scenes, so I can't complain about it. It'd be like if I complained about the lack of martial arts fight scenes in Romeo and Juliet. So if people disliked the film because there was no explanation, then they're just people with wrong opinions. Jenia and Riley's discussions are more just musings between two people that, literally, have nary a clue as to what the fuck actually happened. But they never mislead you into thinking that they would provide answers. While the characters themselves have existential thoughts about what this all means, why is it them, is there some sort of divine interference here, is it a test and all sorts of other issues. And I don't think the film ever deluded itself or anybody else for that matter. You shouldn't go in expecting any sort of answers. There's absolutely no explanations whatsoever given as to what exactly happened to the world and what led to everyone's disappearance. There's no deus ex machina that involves the earth gaining back its lost population or there's a big revelation that allows Jenai and Riley to, at the very least, go back to the United States. Let's just get this out of the way and there will be SPOILERS (I can put a warning prior to the review on Letterboxd, a little box you click, but not on Flixster), so just look away or something. And I don't mean that to say that there's no real purpose to the film or its narrative, I find the exact opposite to be true, but nothingness and existentialism are some of the biggest themes the film touches upon. It relates in that you could say that this film is, essentially, about nothing. How does this relate to a film about an American couple, vacationing in Iceland, that find out that they're the only two people left on earth. Jerry Seinfeld was always awful, so I didn't care about him one bit. I think it's a terrible show that makes waste of some really talented comedic actors. I've given it shot after shot after shot and I've never gotten the appeal. I hate Seinfeld with a passion and I still do. I don't like to make statements like that, though I'm probably guilty of them, because that implies that you've seen every comedy series ever made, and not just from your own country. 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