One alternative investment that has no additional cost after your investment is mineral rights.

So in that case they're selling the "land" only and not the minerals.

Before we made $1 m in residential RE, We made over $1m in RE mineral rights but price of our entry was slightly high.  

Other states with lower tax basis have mineral and oil royalties.

We then de-listed it to convert it to a 5 bedroom (still under renovation).I haven't noticed much of a difference between BR/Mineral Bluff/Morganton.

For example: A major in economics and a miner real estate, or something like that that will give you more knowledge later in life.

We rely almost exclusively here on mineral extraction for income, but virtually everyone had electric cars. 

With that said there are plenty of words we could use, heck society use minerals to label all of the time.

“Broker” means a person who, for another, and for a compensation or valuable consideration directly or indirectly paid or promised, expressly or impliedly, or with an intent to collect or receive a compensation or valuable consideration therefor, appraises, auctions, sells, exchanges, buys, rents, or offers, attempts or agrees to appraise, auction, or negotiate the sale, exchange, purchase, or rental of business enterprises or business opportunities or any real property or any interest in or concerning the same, including mineral rights or leases, or who advertises or holds out to the public by any oral or printed solicitation or representation that she or he is engaged in the business of appraising, auctioning, buying, selling, exchanging, leasing, or renting business enterprises or business opportunities or real property of others or interests therein, including mineral rights, or who takes any part in the procuring of sellers, purchasers, lessors, or lessees of business enterprises or business opportunities or the real property of another, or leases, or interest therein, including mineral rights, or who directs or assists in the procuring of prospects or in the negotiation or closing of any transaction which does, or is calculated to, result in a sale, exchange, or leasing thereof, and who receives, expects, or is promised any compensation or valuable consideration, directly or indirectly therefor; and all persons who advertise rental property information or lists.

You need to look at maps prepared by the Oregon Department of Geology and Mineral Industries (DOGAMI).