Asbestos is a problem to miners not minors, and to ship builders.

They are used more frequently with regards to ascertaining mineral rights.

I've been watching brazilian miners lately - seem to be doing well...RTP, RIOThese have been climbing fast lately, but seem like they have more room.

Needs miner repairs, but rentable in the condition it is in. 

I have some oil and gas mineral rights I would like to sell in the Lubbock, Texas area some day.I never was much of a borrower - not because I did not have the available funds, but because I always found ways to invest without having to borrow money.

About 3 years after investing in the property, the natural gas and oil boom moved into my area, and I was able to get a fat check from leasing my mineral rights.

Where the application of a new roof covering over wood shingle or shake roofs creates a combustible concealed space, the entire existing surface shall be covered with gypsum board, mineral fiber, glass fiber or other approved materials securely fastened in place.1511.5 Reinstallation of materials.

I don't mean groups that trade mineral rights or air rights.

There are other (Non RE) passive options (Stocks, bonds, mineral rights, crypto, etc) with various levels of risk/return. 

I come from a family of teachers and coal miners, so it tells you a lot about where their security is.