With all due respect to Weller, whose equipment I have used for years, that link is advertising! traditional solder was a variation of amounts of lead, tin, antimony, and bismuth. this has no lead or bismuth, and they are saying it is worse? How much soldering are you going to be doing. As already said above, cooker hood filters are activated charcoal and activated charcoal, despite what the manufacturers say is pretty much all the same, and a universal filtering medium for water air, gasses, virtually everything, I do not replace the filters in my cooker hood, I just put them in the dishwasher. Put a good cooker hood over your work space, or wear a carbon filter mask if you are worried about it The other day I was in Plumbcentre, and bumped into a guy from years back who has been plumbing since he was 14, and now he's coming up for eighty and still working! and all that time or most of it using lead. Remember food is stored in cans that are coated with tin, or at least they used to be, now they use a plastic laquer and we are all suffering from low sperm count because of the bisphenol in the plastics.