leoedin

49 ms·

691.
by leoedin 5y ago
Generating rocket fuels with renewables will only be carbon neutral when we have an excess of renewable energy. Until then, either the solar panels would be better used to replace fossil fuel generation on the grid, or the synthesised metha
692.
by leoedin 5y ago
The problem of inflated house prices extends to the suburbs and beyond
693.
by leoedin 5y ago
A lot of these investors are 50+ year olds who've benefited from tremendous unearned wealth from their primary residence. When you own outright your main house and have paid effectively no rent or mortgage payments for decades, that su
694.
by leoedin 5y ago
I wrote more in another comment - https://news.ycombinator.com/item?id=28391526 Basically the qcovid calculator tells you the overall risk during a specific period of the pandemic . Most people didn't get covid during
695.
by leoedin 5y ago
I've been running one of these for a few months. The filter has slowly turned darker brown - which suggests it's working (not anywhere near forest fires here!). It has a trickle mode which is completely silent and uses about 1W of
696.
by leoedin 5y ago
The risk of hospitalisation for most people who get covid is way higher than 0.01% - it's about 1% for a 21 year old man, 2.7% for a 30 year old man and 8.5% for a 50 year old man - and only goes up from there. https://www.e
697.
by leoedin 5y ago
That calculator includes an estimate of likelihood of catching covid - so the actual risk of hospitalisation for someone who does catch covid is way, way higher - for a 25 year old man in the US it's about 1.6%. https://www.
698.
by leoedin 5y ago
That calculator isn't telling you the risk of hospitalisation per case, but the risk of hospitalisation over a 90 day period during the first peak of the pandemic. The two are very different. The calculated risk includes the fact that
699.
by leoedin 5y ago
Faced with some lawn repair, I once joined the lawncare subreddit. It was an intense echo chamber of lawn adjacent neuroticism - stress over chemicals, mowing heights, quite a few people angry at their neighbours for foolishly trying to do
700.
by leoedin 5y ago
I bet 95% of the houses in the UK are smaller than 250 square meters. A big house might be 150 or so. Most families probably have around 100 square metres. Somehow we survive!
701.
by leoedin 5y ago
The biggest turbines stopped being land based years ago. Onshore wind caps out around 6 MW, while offshore wind is pushing 16 MW. There's just no practical way to handle these huge turbines (and their massive blades) onshore.
702.
by leoedin 5y ago
But what's the end goal? Do we keep lockdown restrictions forever? The case fatality rate for a vaccinated population is really low. There must be an acceptable level - after all we don't lock down for other endemic viruses which
703.
by leoedin 5y ago
As long as the carbon contained in that methane comes from environmental carbon, rather than fossil carbon, the net effect on CO2 levels is 0. If a tree absorbs CO2 to grow, dies, gives off methane and that methane eventually turns back int
704.
by leoedin 5y ago
If you don't want to be permanently tinkering, there's a whole range of e-bike conversion kits which work well. I've got a Tongsheng TSDZ2. You remove the pedals and chainring and slot it in place, and your bike is electric.
705.
by leoedin 5y ago
For anyone wondering what "ancient" means - it was 5 months ago. Maybe the commenter has a different definition of ancient than me.
706.
by leoedin 5y ago
It is, but only for a short time - I think 9 years or so. It's broken down in the atmosphere into CO2 and water.
707.
by leoedin 5y ago
Do you mean green hydrogen? Blue hydrogen is made from methane - it is essentially a fossil fuel.
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by leoedin 5y ago
I wonder what proportion of the carbon in a plant comes from fertilisers vs CO2 taken in while growing? It looks like some fertilisers do contain carbon - but not all. Eg ammonium nitrate doesn't, urea does. The ammonia tends to be pro
709.
by leoedin 5y ago
I don't understand why we care about cow greenhouse gas emissions. The carbon in that methane and CO2 comes from plants, which extracted it from the atmosphere. If those plants were instead eaten by a different animal, or burned, or de
710.
by leoedin 5y ago
> I can't invite my teetotaling and vegetarian friends out to many of the casual things I enjoy I'm curious about this. Why not? I'm not vegetarian, but I go out for dinner with vegetarian friends all the time. They order
711.
by leoedin 5y ago
Contracting isn't inherently bad, but contracting jobs on short term temporary contracts with 2 year cliffs, regardless of performance, seems inherently cruel. Presumably they're doing it to avoid having long term employees, who m
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by leoedin 5y ago
Digital aptitude is really just a willingness to try things with technology. Wanting to do something and so trying to make the computer do it until it does. It's a mindset, and in my experience not one which is related to year of birth
713.
by leoedin 5y ago
If carbon tax is dead, what's the alternative? Is there one? I certainly can't think of one. Ultimately the problem is that people aren't going to vote for things that make their life worse. And reducing fossil fuel usage cur
714.
by leoedin 5y ago
Sure, disruption for a while. But people would cope. There's plenty of houses in Canada built to 1800's standards which are surviving fine through -30C winters. The cars, electronics and transport infrastructure isn't radical
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by leoedin 5y ago
Back when I ran a fairly large forum we had to ban non-English content simply because we couldn't understand it, and so couldn't moderate it. I'm guessing that's a big part of it - How do the HN moderators distinguish th
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by leoedin 5y ago
Most Western countries have some level of extraterritorial benefits. At least in the UK they're nominally "paid for" by the cost of the passport. If you're a dual citizen with another country you have no obligation to ge
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by leoedin 5y ago
I don't think that's quite how it works. This device (or any thermoelectric generator) converts a fraction of the heat energy flowing through it into electrical energy. That means energy has to flow through it for it to work - ess
718.
by leoedin 5y ago
I'm glad this is getting attention. These ISO standards are legislation in a lot of countries. If you wish to sell a product which falls under their remit you are legally required to be compliant But the only way to know you're
719.
by leoedin 5y ago
It sounds like the Clark County restrictions are a very cautious conservative requirement for an untested system. They don't want a tunnel full of burning Teslas on their hands. I don't think this whole concept should be dismissed
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by leoedin 5y ago
Long distance driving in a sparsely populated country is quite different to long distance driving in a densely populated one. Driving the length of the UK means passing by 3 or 4 major cities. The road gets wider, motorways merge, traffic g

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