I talked to a tech about it. His advice was that it depends on the type. Heat pump water heater is about sound of a stove exhaust fan, with a higher pitch. No bass.
Heat pump for room heating is lower pitch. Not bassy. But there are regs in some cities about how close to property lines they can be.
Synology is more closed down but they make it very easy to use. Note that nas prices don't include the hard drives - that could be $250 alone. Recommend finding one from past generation.
But even a furnace/fireplace is subject to incomplete combustion, where some portion of the wood is transformed into byproducts that rob some of the energy of the fire. There's actually a big difference in the amount of energy you can get out of a fire, depending on the type of stove that's used.
That's some of what NGOs have tried to do for developing countries - find cheap and easily produceabke stove designs that can reduce the amount of wood needed and improve air quality in the home.
The DNA test is just testing for genes which tend to be in certain groups - but that's not necessarily the case - and the lines they draw between groups are arbitrary.
E-motorcycles really are best of both worlds. Small, mobile, and more energy efficient. Plus high torque means it feels powerful. They were available on market several years ago - I remember seeing a Wired piece on one.
Motorcycle emissions standards are incredibly lax by today's standards when compared to cars. That Prius just might be releasing less toxic substances than your motorcycle - while being able to cart around more people and stuff.
Go start appreciating art. I don't mean pay thousands for paintings. I mean go to poster shops, art galleries, craft fairs, etc. if you find something that you really like, you can probably find a print that is a decent price.
Or just start looking for pictures online of places you went to vacation. Flickr was good for this, if that's still a thing. Yes, you could print big versions of your own photos - but why when there's someone out there that probably took a better picture with a much nicer camera. Just get that photo printed on a metal frame or canvas sheet and hang it on the wall.