Yeah, but those metal tubes were awful. I have been brushing my teeth with Tom’s of Maine for decades, and I remember how much I hated those metal tubes. They always split open weeks before the tube was empty and then they’d leak and make a mess and I inevitably wasted a lot of product. When Tom finally sold to whatever corp and they switched over to the plastic tubes that don’t leak and let me use all the toothpaste I paid for, I danced a little jig.
The group think around here is so crazy. Should we be using less single use plastic, especially the thin films? Absolutely. But the environmental impacts of mining all that metal and making all that glass to replace plastic with, plus the added energy for transporting the heavier packages and the cost of increased spoilage and product lost to dented cans and broken bottles, dwarfs the negative impact of the plastic replacements.
I actually work in the wastewater industry and from what I’m reading, a properly functioning sewage treatment plant already captures a very high proportion of microplastics. This widely cited study noted above 98% removal efficiency at one plant.
We’re already at approaching 2 log (99%) removal without actually trying to. It doesn’t seem improbable to me that with a few relatively modest tweaks to the system we could get 3 log removal (99.9%). Getting to 4 or 5 log removal is likely where things will get really expensive and challenging. But for now, a 2-3 log removal is probably good enough to focus on other sources like tire fragments/dust that typically pass directly to receiving waters with no treatment at all.
First, IBC has had this as code for at least 15 years.
The International Building Code (IBC) establishes minimum requirements for airborne and impact performance of multifamily buildings. The minimum code requirement is STC 50 and IIC 50. Since many factors can affect the transmission of sound in the field, including non-standardized source and receiver rooms as well as construction tolerances, a field measurement (ASTC or AIIC) of three to five points below the lab measurement is acceptable to meet code requirements.
As the understanding increased of how STC and IIC ratings correlate with occupant comfort, the International Code Council (ICC) issued ICC G2-2010, “Guideline for Acoustics,” which established two additional levels of acoustical performance:
acceptable, defined as STC 55 and IIC 55; and preferred amount of isolation as STC 60 and IIC 60
Second, all the money is most definitely not in the land. As a general ballpark, developers want the land to be under 1/4 of the total cost of the project.
Larger buildings are required to do this under IBC, and have been for many years. You can absolutely make a modern multifamily wood framed building quiet with proper design and construction.
There’s no perfect building material. Wood has issues. But concrete is terrible for the planet from a climate perspective and we’re rapidly running out of quality aggregate (especially sand) in many parts of the world. You can make a list of pros and cons about any other material, too.
Pudding used to come in cans (lemmy.world)
What could my upstairs neighbor possibly be doing to make this much noise?
Their foot steps sound like they just have 2 pegs for feet… they hit so hard....