It is corrugated asbestos on the ducts, and asbestos paper on seams and the register boots. Does the state in which you live have a certification / license for asbestos consulting? If so, please find a good consultant. Many other things in you house may contain asbestos (e.g. drywall joint compound, sheet vinyl flooring, ceiling texture, stucco, window putty and more).

My position on lead and asbestos isn't exactly popular here, so I may get flamed, bur I'm old enough that I think my decent health says I might be on the right track. I grew up in that era of "peak asbestos" that SJ talks about. It was probably peak lead, too, because every car on the road ran on leaded gasoline. I don't want to go back to those days, though, because neither lead nor asbestos is good for you. However, I do think that the dangers of both to the average homeowner have been exaggerated. Initially this was through sensationalized television reports, and more recently through overwrought social media posts. Let's face it, fear sells. SJ is right that a lot of building materials used asbestos, back in the day. But it wasn't the people who lived in the houses built with asbestos who got sick from it. It was the tradespeople who installed it and, even more, the factory workers who produced it. Casual and incidental contact with asbestos products in good condition isn't going to hurt you. You might not even be significantly harmed by taking a pry bar to a roomful of asbestos ceiling tile once or twice. That said, I strongly recommend that if you're going to work on building materials that you think might contain asbestos, you isolate the area where you're working with closed doors and/or plastic sheeting, keep an exhaust fan running in the window, and wear a good quality particulate filter mask. The more you're exposed to asbestos products being torn apart and beaten up, without proper protection, the more risk you take with your health. It's up to you where you want to draw the line with that, but I'll say that I've worked on a couple of asbestos-tile ceilings over the years, and I'm not very concerned about it. BTW, I was a bit amused several years ago when I was taking bids on having some asbestos floor tile removed. The 2 contractors who made the loudest noise about the asbestos both drove off in their trucks with their seat belts unfastened. :) As for lead paint, IMO it's a concern mainly if you have children or pets who might ingest paint chips flaking off, or chew on painted woodwork. I also recommend that you avoid sanding paint that might contain lead. Otherwise, I wouldn't worry so much about it. In most cases, you can just paint over it to seal it in. Keep that paint film in good shape, and you'll be fine.

It's unlikely if the house was built in 1980, but you can get it tested to be sure. FWIW it looks more or less the same as our flooring in our (much older) home when we pulled up newer tile--that was tested and cleared.

Toxicologist also mentioned chrystille fibers are mainly in building products and have not been know to cause problems. Just is so confident in her research that she removed asbestos tile from her own house without a respirator. I had to confirm that multiple times becasue it puzzled me. She said its pathologist that push the other narrative.