I was in charge of respiratory protection at one facility. These n95 masks should never be used for anything like asbestos. You need half (pictured with hepa stacked with organics filter) or full face silicone respirator masks with hepa filters. Those masks require you to be clean shaven and proper fitting. Any paper mask provides only rudimentary filtering. They should not be used when exposure to anything really hazardous is likely. In our case people were handling very large bulk shipments of quartz, with a lot of crystalline silica dust. Another good use of these is for welders to avoid welding fume... they make full face welding respirator masks too. You can even get them powered to make it easier to breathe with the added cooling benefit of the air flow.
Same idea if you are using other materials, but you may need to attach other replaceable filter types to the mask, like filters for organic vapours (real meaning of organic in science) etc.
For really hazardous conditions in other areas, we used supplied air on backpack for short duration, and with remote supplied air (racks of very large tanks of certified breathing air) for long duration... With full safety suits when required.
try 'coal heating china' if you need help with a suitable search term
- One... iodine does NOT come with sea salt OR mined salt. All salt has to be fortified with iodine if you want iodine in it.
- Two... people NEED iodine in their food. It is ABSOLUTELY necessary in our diet to prevent goitre and more importantly to prevent cretinism. The human race took a HUGE jump in intelligence when salt began being iodized. It is easy to see families who buy into all the bullshit and decide iodine is not good for you. They are the stupid ones.
- Three... ALL salt that we use is sea salt. The salt that is mined from under the ground comes from seas that evaporated a long fucking time ago. Table salt == sodium chloride... whether you get it as the residue of freshly evaporated sea water, or sea water that evaporated a long time ago.
- Four... you don't get much if any benefit from the 'extra' minerals in 'sea salt'. It has the same sodium content as mined salt, and since the amount of these minerals are found in much higher quantities in the food the salt goes on, the amount in the salt is moot.
- Five... the difference is usually more a matter of taste. But get iodized sea salt if you like it better.
Cook responded that there are many things Apple does because they are right and just, and that a return on investment (ROI) was not the primary consideration on such issues.
... 'We do a lot of things for reasons besides profit motive, We want to leave the world better than we found it.'
If they wanted to do something really good, they'd stop off shoring all the work going into making their devices (which they lock you into), and create jobs for people in the country that buys most of their goods, and whose whole cultural and economic system allowed the company to come into being. Of course their whole client base is more concerned about being 'cooler than the next person' which includes the latest cause de jour. In this case the environment. Who really gives a fuck about the unemployed when you can get your Chinese made bling? I don't like any company off shoring, but I really hate companies that make phony news stories in a spasmodic bowel like cynical spout espousing their so called pile of bullshit beneficence.
And in the end, they are left with the zealots who would sing the praises of anything Redmond puts out, and are now mainly a source of amusement as every time a person posts on an issue with their train wreck OS, the reply is a variation on "If you don't like it, you're a dumbs" or "Update hosed your computer? Of course it's your fault."
I can't resist. You can change this paragraph to the one below, and it will still be true:
And in the end, they are left with the zealots who would sing the praises of anything LINUX, and are now mainly a source of amusement as every time a person posts on an issue with their train wreck OS, the reply is a variation on "If you don't like it, you're a dumbs" or "Update hosed your computer? Of course it's your fault."
Zealots, fanboys, whatever, are a bane. Not of anything in particular, just a bane.