41–50 of 79 posts
Anyone selling house-size CO2 absorbers to keep CO2 in my house to more like pre-industrial 200ppm rather than the 800ppm that's more common of house air in cities?
Earlier quoted context omitted.
Be glad people still believe anyone ever went to the moon at all. That may not be the case in a few more years.
Pretty soon it will be possible for tourists to visit the moon and see the litter we left with their own eyes. In fact, job 1 needs to be building fences around the landing sites so people don't trample all over them.
Refueling from lunar materials might be possible but volatiles seem precious. The mission with that vehicle that makes the most sense to me is to land it with a full payload and use it for habitat, workshop, storage tanks or scrap metal.
Space tourism to a micro O’Neill colony in LEO decked out as a flashy space hotel seems more believable to me. I designed one that needs 15 Starship loads of LN2 for the atmosphere but that is fewer launches than they plan to put one Starship on the moon.
Anyone selling house-size CO2 absorbers to keep CO2 in my house to more like pre-industrial 200ppm rather than the 800ppm that's more common of house air in cities?
It's worth remembering that this is 1960s technology.
Anyone selling house-size CO2 absorbers to keep CO2 in my house to more like pre-industrial 200ppm rather than the 800ppm that's more common of house air in cities?
Earlier quoted context omitted.
Be glad people still believe anyone ever went to the moon at all. That may not be the case in a few more years.
Pretty soon it will be possible for tourists to visit the moon and see the litter we left with their own eyes. In fact, job 1 needs to be building fences around the landing sites so people don't trample all over them.
Anyone selling house-size CO2 absorbers to keep CO2 in my house to more like pre-industrial 200ppm rather than the 800ppm that's more common of house air in cities?
Not sure what city you live in but in the big cities I’ve lived in it was always easy to get the level down to 500ppm by opening windows.
Anyone selling house-size CO2 absorbers to keep CO2 in my house to more like pre-industrial 200ppm rather than the 800ppm that's more common of house air in cities?
The logistics would be complicated, average plants aren't going to be accumulating so much mass so quickly. You would need aquariums full of algae. Just isn't worth it.
Anyone selling house-size CO2 absorbers to keep CO2 in my house to more like pre-industrial 200ppm rather than the 800ppm that's more common of house air in cities?
The average human exhales about 1 kilogram of carbon dioxide on an average day. Carbon makes up 27.3% of that: ~300 grams. That's the weight of a smartphone. The logistics would be complicated, average plants aren't going to be accumulating so much mass so quickly. You would need aquariums full of algae. Just isn't worth it.
Anyone selling house-size CO2 absorbers to keep CO2 in my house to more like pre-industrial 200ppm rather than the 800ppm that's more common of house air in cities?
An actually physically feasible thing you can do is to whitewash some walls. You need to apply about 7kg of whitewash per person per week, so you are going to need a lot of walls, on the order of 400 square meters of wall per person, because the whitewash is regular lime, not soda lime. (If you're daring enough to dope your whitewash with lye, maybe you can get by with less wall area, but you still need to keep applying the whitewash at 7kg per person per week.) You can make them out of plywood, sheetrock, sheet metal, old sheets, whatever whitewash will stick to. After a few months you will need to start throwing out 14kg of fully cured whitewash per person per week, or calcining it to make fresh whitewash. Try to get whitewash with as little chalk in it as possible.
At this small scale, dozens of kilograms per week, you might be able to calcine the used whitewash in a pottery kiln on your patio. Beware that electric kilns generally do not handle reducing atmospheres well. I'm not sure if carbon dioxide would be too much for them. I think it should be fine, but don't blame me if you ruin your Kanthal.